When heading up the steep, narrow staircase to the second-floor South Florida Boxing Gym on Washington Avenue, a stale odor wafts into your nostrils. It's that unmistakable smell of sweat, which, though rank to some, is actually the first sign of a good gym. It means members are not busy admiring themselves in the mirror, or reading a gossip rag while "running" on the treadmill. It means hearts are pounding, pulses are racing, and people are working out. Since opening the gym almost nine years ago, owner Trevor Cedar has cultivated a following of men and women alike by offering a host of classes — all taught by professionals — designed to suit any age and ability, including technical boxing classes, muay thai kickboxing, and jiu-jitsu. Each participant gets to pound out aggressions on his own bag, and if that's not enough, don a mouthguard and step into the full-size boxing ring for a sparring class. If this place doesn't get you into fighting form, nothing will.