http://www.nypost.com/p/news/national/game_plan_for_groupies_lLnBOgYs0bNfe94aGw0xXL She knows how to sack a Super Bowl star. A groupie guru is coaching ring-chasing chicks on the art of playing the field at the Conrad Hotel & Resort in Indianapolis, where current and former footballers will be staying for the big game. “Timing is everything,” writes Stephanie Ogbobu, 27. The Austin, Texas, b…