The most hardcore workout of 2013

Leave it to Brooklyn to take a YouTube sensation and turn it into a fitness craze. If you haven't seen the daring stunts known as Parkour, or free running, you should check them out, and then go to Bklyn Beast to learn how to do them yourself. Bklyn Beast offers fitness classes incorporating Parkour, Capoeira, and Dance at their new facility, which includes a trampoline, foam pit, and juice bar. So even if you're not out to impress your friends by jumping off buildings, you can still have what is probably one of the most fun workouts ever. Prices vary by class, drop-in Parkour class is $18.