Among the more combative sports, boxing prepares its initiates with the proper techniques for one-on-one bouts and primers on intimidating opponents while wearing Mother's robe. Expertly mix fashion and fist-throwing with today's Groupon: for $20, you get a 10-punch pass card to John's Boxing Gym in the Bronx (a $100 value).

Home to Golden Glove champions and Showtime Championship boxers, John's Boxing Gym helps jabbers put power in their punches with its boxing-dedicated workout space. A retinue of 20 punching bags absorbs fist poundings, building up biceps and Wolverine knuckles with heavy, uppercut, and speed-specific varieties. Once comfortable with standard jabs and punches, glove-clad guests can bout in the gym's two boxing rings, trading blows while practicing defensive maneuvers. During the 10-visit residency, boxers can use all the gym's resources necessary to buff up and get into shape to fend off unprovoked jack-in-the-box swings.