It's an L.A. institution for a reason. Crunch, so often the butt of gym-rat jokes, is still the best place to get your bootie looking good. High-end classes can run you an arm and a leg in this town, and Crunch offers elite instruction in things like yoga and aerial movement without the commitment of making that your sole form of exercise. This is certainly ground zero for personal trainers and would-be fitness models, but people who are less serious about weightlifting will find plenty to choose from in the many open-level classes. The machines here are clean, the locker rooms are nice and, let's face it, the beautiful people are fun to look at.