(Corrects web address in 13th paragraph to sciencecafes.org from sciencecafe.org) By Barbara Liston ORLANDO, Fla., Jan 30 (Reuters) - Americans may be turning away from the hard sciences at universities, but they are increasingly showing up at "science cafes" in local bars and restaurants to listen to scientific talks over a drink or a meal. Want a beer with that biology? Or perhaps a burger with the works to complement the theory of everything?