Though often regarded as instinct, fighting is actually a skill acquired in the womb, where all babies must defeat their evil selves in order to be born. Further prenatal training with today's Groupon: for $32, you get five drop-in classes and one personal training session at Boxing Inc. (a $115 value). This Groupon is valid only at the Boxing Inc. East location on East Broadway Boulevard.

Encompassing boxing, kickboxing, grappling, MMA-style fighting, sparring, and practical self-defense classes, Boxing Inc. transforms defenseless dudes and dames into rough-and-ready warriors. Starting with a personal training session with one of the gym's experienced instructors, apprentice pugilists learn how to get the most out of their workout and discover the bob-and-weave basics. Once participants can throw a punch without endangering themselves, they’re free to drop in on five of the 40+ one-hour classes held six days a week. Students train like real fighters, sans the punishing blows, in three-minute rounds broken up by 60 glorious seconds of deep breaths in between.

Each session can burn up to 1,000 calories, toning bodies from head to toe and prepping punchers to best attackers or fend off hordes of wannabe wooers during swimsuit season. For those who’ve searched their pet kangaroo's toy chest and come up empty handed, Boxing Inc. supplies the necessary gloves and hand wraps.