Although 3-D technology was invented centuries ago, it was suppressed by early American Puritans, who believed wearing multicolored glasses was a form of witchcraft. Enjoy modern society’s tolerance of depth perception with today's Groupon: for $99, you get one 3-D swing-analysis session at the AthletiCo Golf Performance Center in Oak Brook (up to a $325 value, $250 for members). AthletiCo's training facility stays swinging year-round, its golf-fitness equipment, instruction, and 3-D technology improving the scores and well-being of Chicago-area golfers. Your 3-D swing analysis includes a 45-minute physical evaluation, during which a Titleist Performance Institute certified golf fitness instructor will help you identify any limitations in your swing, as well as a 45-minute swing evaluation featuring the K-Vest, a motion-capture system that examines your mechanics and calculates your torso and hip rotation. Your instructor then analyzes the data, bestowing you with a customized conditioning program to help soup up your swing and prevent the devastating injuries that cause most golfers to turn to rugby. Golfers are urged to bring their own club.