12. Lifetime Fitness
No. of locations: 128 (including Canada)
Lifetime Fitness is one of the most popular gyms nationwide. It is spread throughout US and Canada, and most of the gyms are opened 24/7. Apart from usual training facilities, machines, swimming pools, rock climbing walls (not that usual), there are also child care centers and food courts and salons, which give the most comfort, there can be of a gym.
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