• Address:140 E 17th St, Costa Mesa, CA 92627
  • Phone:(949) 200-9499
  • Website:
  • Rating:4.9
  • Hours:
Mon 05:00 am - 09:00 pm
Tue 05:00 am - 09:00 pm
Wed 05:00 am - 09:00 pm
Thu 05:00 am - 09:00 pm
Fri 05:00 am - 09:00 pm
Sat 07:00 am - 05:00 pm
Sun 07:00 am - 05:00 pm
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Reviews

Rated 4.9/5 based on 25 customer reviews.
March 22, 2020 21:49

Great variety of exercises, fun atmosphere and workouts delivering results, great monthly price for unlimited sessions and very good coaches .

December 27, 2019 22:36

I've been going here for the better part of 5 years. Love it. I quit my 24 hour membership that I had for over 15 years.

December 23, 2019 11:54

Love the 12. All of the trainers and staff are amazing. I never thought I would enjoy group fitness like this but it is hands down the best gym in Orange County.

September 13, 2019 00:47

This place is OK. The Boot Camp fractional training class area is pretty cool and really big. You can definitely get a great workout in here. I mainly want to lift weights and use the gym. The gym has a lot to be desired. Nice staff and great people here but the weight room and cardio is pretty limited. If you are looking for Boot Camp style classes this is a great place to go. If you were looking for a gym you may want to have another gym as back up. EX...Curl Fitness....equinox...

September 7, 2018 21:21

The staff and trainers here are always so welcoming! Austin at the front desk memorized my name by my second class! Jessica is such a ball of fire! She may be small but her talent is big!

August 25, 2018 00:01

The trainers here are super energetic and fun. Anyone who wants to have a good time getting fit should check it out

August 2, 2018 16:31

Great program... excellent instructors and staff. Need to have more seniors sign up to really get in shape!

August 2, 2018 16:31

Great program... excellent instructors and staff. Need to have more seniors sign up to really get in shape!

July 23, 2018 15:39

I've never had more fun at a gym. The atmosphere is unreal and my workout at the 12 is the best part of my day. From all of the hugs and high 5s I've received since day 1, to the staff remembering my name, the 12 is incomparable to anywhere else!! Also, please don't take Matt's class, they're full enough and we need more room in there ;)

July 23, 2018 15:39

I've never had more fun at a gym. The atmosphere is unreal and my workout at the 12 is the best part of my day. From all of the hugs and high 5s I've received since day 1, to the staff remembering my name, the 12 is incomparable to anywhere else!! Also, please don't take Matt's class, they're full enough and we need more room in there ;)

July 20, 2018 13:39

If you're looking for friends to workout with, hit The 12! A very motivating environment with trainers looking out for you so that you can look and feel your best.

July 11, 2018 03:41

My friend was looking for a good place to workout by her house in Newport. I found this place when visiting her and it was exactly what we were looking for... high intensity, strength and interval training.

I then moved to CA from Chicago, missing my gym bad. So of course I went to the 12.

Every single one of the staff is the best in their own ways - Austin, Matt, Jessica, and on. Drive, form, results, just enough silliness. You own the effort, they deliver the results. I drive 20 minutes to 12 Costa Mesa for 5AM classes - i think that says it all.

July 11, 2018 03:41

My friend was looking for a good place to workout by her house in Newport. I found this place when visiting her and it was exactly what we were looking for... high intensity, strength and interval training.

I then moved to CA from Chicago, missing my gym bad. So of course I went to the 12.

Every single one of the staff is the best in their own ways - Austin, Matt, Jessica, and on. Drive, form, results, just enough silliness. You own the effort, they deliver the results. I drive 20 minutes to 12 Costa Mesa for 5AM classes - i think that says it all.

July 3, 2018 13:58

They do an excellent job at genuinely motivating you to push your self to the max. I've never wanted to go work out as much as a do at this place. Definitely worth the $

July 3, 2018 13:58

They do an excellent job at genuinely motivating you to push your self to the max. I've never wanted to go work out as much as a do at this place. Definitely worth the $

May 8, 2018 14:19

I joined The 12 training classes a month ago and I have had the best experience out of every gym or fitness class I have ever tried. The 12 is not just a workout class where you show up, do minimal work, talk to one or two people, and walk out never seeing them again. It is a tight-knit community of people excited about their health and fitness goals and ready to work hard. I have never been a morning person, but now I get up at 4:30 a.m. to go to The 12.

All the trainers I have met are awesome: Matt, Jessica, and Miquelle. They know what they're talking about and have a great mix of humor, energy, and work ethic. I'm also very excited about a new trainer starting in the next month, Taylor. Highly recommend these specific trainers and The 12 Costa Mesa!! Two thumbs up and all my fingers and toes. =D

May 8, 2018 14:19

I joined The 12 training classes a month ago and I have had the best experience out of every gym or fitness class I have ever tried. The 12 is not just a workout class where you show up, do minimal work, talk to one or two people, and walk out never seeing them again. It is a tight-knit community of people excited about their health and fitness goals and ready to work hard. I have never been a morning person, but now I get up at 4:30 a.m. to go to The 12.

All the trainers I have met are awesome: Matt, Jessica, and Miquelle. They know what they're talking about and have a great mix of humor, energy, and work ethic. I'm also very excited about a new trainer starting in the next month, Taylor. Highly recommend these specific trainers and The 12 Costa Mesa!! Two thumbs up and all my fingers and toes. =D

February 6, 2018 16:24

David is a fantastic personal trainer!! He's so encouraging and enthusiastic!! Not only is David extremely knowledgeable about fitness and nutrition, he also makes working out so much fun!! He's the perfect blend of coach, adviser and personal cheerleader!! I would highly recommend David to anyone and everyone who is looking to get fit and have fun while doing it!!

January 27, 2018 14:25

David's energy, dedication and sense of humor makes him a great personal trainer. He believes in his clients and pushes them past their perceived limits. He has given me tips that have made a big difference in my workouts. He also has lots of nutritional info and will even set up a nutritional program for you. Like he says, "80% is what you eat!" I have added a couple supplements that he suggested to my workout routine. Now I consistently feel stronger and my energy lasts longer during my workouts. I am 57 years old and really just started working out regularly a couple years ago. My goal is to stay strong and active all through my second half of life. David's support has really helped me with this goal. So worth the investment!

January 17, 2018 20:04

Check out The 12, you will find results. The group training is a great community of individuals that want to better themselves. The instructors will help motivate you. David Prizer (Personal trainer) is awesome and can get you to the next level with nutritional coaching and training in the gym area. If you want to go at your own pace, you can buy a pass to the gym and enjoy all the latest equipment. Do it!

January 17, 2018 17:03

A good friend of mine started this gym a few years ago called the 12. It is much more than a gym if you talk to the members that train there. There are gyms scattered all over Orange County but some of the positive and unique attributes of the 12 are the people that train there along with the amazing staff. Yes it's all top of the line equipment.. etc.. etc.. but the fun thing about this gym is the trainers and the friends you get to see at the gym when you go in to workout. Through a lot of work and effort they have really cultivated a top of the notch experience for their members. Thank you!!

October 25, 2017 12:32

I liked the fact that my instructor actually came over and helped me improve my form during class. That's all too rare these days in group classes. Great class and studio vibes!

October 25, 2017 12:32

The 12 has a vision for health and fitness and group training like I have never seen before. Every staff member, group trainer, and even gym members and class takers are the most supportive, encouraging, and hard working people! I walk into The 12 every morning knowing that I will be greeted with a big smile by the staff members and pushed harder than ever before in my workouts. The 12 reminds me how to have balance in life with long term goals, and that has changed my view of my own fitness and nutritional journey for the better.

October 25, 2017 12:32

I am coming here after finishing my contract with Equinox in Irvine. While this does not have the pampering aspects of that gym line, it more than makes up for that with the fitness equipment and staff. It's very clean and has a nice selection of equipment to use. If you can do without the spa and pampering, and want to focus only on fitness, here is the gym for you! Definitely worth checking out!

October 25, 2017 12:32

I would highly recommend this gym whether you are experienced at working out or a beginner because the staff and environment is very welcoming and you really feel a sense of belonging. It's very clean which is a big thing for me. Plus the personal training I have received is amazing! They also give back to the community in really great ways. Definitely should be your number one gym to check out!

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