With almost 30,000 square feet of workout space, Body Perfect should really have its own ZIP code. It certainly has everything else. This behemoth offers rows of treadmills, bikes, Stairmasters, and elliptical walkers. Build muscle the old-fashioned way with free weights, or for the latest thing, hop on the Flex Fitness machines. All classes -- kick-boxing, Pilates, spin, yoga, and others -- come free with membership. Ditto for on-site child care. An annual membership costs $36 a month after a one-time $75 enrollment fee. The gym also offers everything from one-day passes to three-year memberships. Tanning and massages are available for an extra charge. It's open from 5 a.m. to 10 p.m. weekdays, with shorter hours on Saturdays and Sundays.