The floor-to-ceiling windows found throughout most of The Mercedes Club let in plenty of sunlight, but there's an even better place to simultaneously catch some beams and get a workout: the 20,000-square-foot outdoor deck. Spinning classes seem to head straight for the horizon, fresh air powers each kickboxing move, and swimmers zipping through the outdoor pool catch the reflections of the blue sky above.

That's not to say the outdoors are than the interior of the luxe gym—both have sizable benefits, as well as plain-old size. The 80,000-square-foot fitness center includes studios for yoga, spin, and boxing and such amenities as an indoor lap pool, a steam room, a juice bar, and a putting green. The spa offers facials and massage, and the lavish locker rooms include towel service and lockers made out of 100% pure unadulterated locker material.