Head to the back of Pro Edge Boxing's gym, and you'll find a professional-size boxing ring that's just waiting for two contenders to square off. Its springy foundation seems to echo with the sounds of lightning-fast jabs and powerful uppercuts connecting with their hapless targets.

This ring isn't for everyone, though. Some of the gym's most dedicated members don't want anything to do with contact sports, so instead they opt for elite fitness programs such as Boxfit, kickboxing, and MMA. There's even a Lunar Boxing class, where participants box under black lights to the pulse of music and lasers. Away from group classes, they can also work out by pummeling six heavy bags, five double-end bags, and two speed bags.