Since its invention, laser tag has entertained as many children as laser hopscotch, laser jacks, and laser red rover have vaporized combined. Score two rounds of intense, beam-streaming competition with today's Groupon: for $8, you get two games of laser tag at Mars Pub and Laser Tag on West University Avenue (up to a $16 value, depending on student status and when games are played). Mars Pub and Laser Tag's pulsating assault arena is 3,000 square feet of neon obstacles and obscurities strategically placed for epic zap-fests. Gather bull's-eyed buddies for two 10-minute laser conflicts, each limited to 14 players to give foes a chance to learn each other's strategy and mock each other's middle name. Although not part of this deal, Mars Pub and Laser Tag complements the combat with an ample list of beers and cocktails, helping placate parched participants after hard-fought battles in the futuristic trenches.