A professional boxer can float like a butterfly, sting like a bee, and, when in danger, curl up like a roly-poly bug. Learn not to punch like a ladybug with today's Groupon: for $33, you get three boxing classes at Executive Boxing Chicago (a $75 value).

At Executive Boxing, former professionals teach a full schedule of group classes to men and women of all skill levels. The 45-minute classes start students off with a jump-rope warm-up to condition the body and improve agility. Fighters are then free to unleash their spirit kangaroos by practicing jabs, crosses, hooks, and uppercuts on a heavy bag. Fist thrusters can also improve their hand-eye coordination on a double-end punch pillow. Circuit training, which includes abdominal work and stair climbs, provides the icing on the fibrous muscle cake, helping boxers build strength and endurance from their heads to their ultra-toned toes.

Stationary cardio equipment and punching apparatuses surround the gym's center sparring ring, and wall-spanning windows and gleaming hardwood floors make training in the space feel like a far cry from students’ days of doing jumping jacks atop cars inside cramped garages. Locker rooms and showers help midday pugilists clean up their acts before heading back to the boardroom, and each Executive boxer can have their parking validated for $2.