The setting of the Equinox Fitness Club, already one of the best fitness clubs in San Francisco, with its Grecian columns and to-the-sky ceiling, should inspire some heroic feats. In contrast to the regal structure, the design style throughout the 33,000-square-foot space is modern, bright, and airy, with all the latest equipment and classes in every discipline the 21st-century urbanite could want. It even offers something called the Commotion Class, a circuit of medicine balls, jump ropes, body balls, and resistance training with partners, encouraging you to get to know your fellow athletes. When it’s time to get wet, descend to the old vault area, where you’ll find a lap pool and plush locker rooms. The Equinox Fitness Club has also a full-service spa, juice bar, thumping workout beats, and a shop.