Trampoline
TrampolineJumpLife is the first gym devoted entirely to jumping. Classes (from $15) take place on 27 personal trampolines beneath a disco ball and neon lights. The 45-minute, top 40–fueled classes are high-energy enough to raise your heart rate and low-impact enough for a January workout. Core work is the key to balance, though each trampoline has an adjustable bar for support. JumpLife, 404 Broadway, nr. Lispenard St.; 212-966-2604 [Photo via @jumplifenyc]