ORLANDO, Florida (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? Science cafes have sprouted in almost every state including a tapas restaurant near downtown Orlando where Sean Walsh, 27, a graphic designer, describes himself and his friends as some of the laymen in the crowd. ...