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 $19, you get three drop-in classes and one personal-training session at Boxing Inc. (an $85 value). This Groupon is valid only at the University Gym location on North Campbell Avenue.

Teaching boxing, kickboxing, grappling, and practical self-defense, 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 three 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 the 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.