Three floors of bright, airy exercise rooms chock full of equipment make this gym the county's top workout spot. An overabundance of stationary bikes and weight machines means there's rarely a delay to start sweating. Although it's located just a block from Ocean Drive, this is more than just a backdrop for Lycra-clad beautiful people with water bottles and towels around their necks: It's a mecca for the aerobically inclined. One significant perk is free parking. There are neither tip-crazy valets nor meters. And there's not one, but two lots. All classes, including spinning, yoga, kickboxing, tae kwon do, and more, are free to members. The locker rooms are clean, spacious, and include steam rooms. XS is open Monday through Friday from 6:00 a.m. to 11:00 p.m., Saturday from 8:00 a.m. to 10:00 p.m., and Sunday from 8:00 a.m. to 8:00 p.m.