Manhattan Theatre Club's production of “The Nap” is the American debut of Richard Bean's new comedy about snooker, a British version of billiards that is to 8-ball what chess is to tic-tac-toe. Why would anyone who wasn't a snooker fan (and there can't be that many in the US) go see a play about it? Well, Bean has made it about gambling, cheating and quirky characters. To be fair, the play could be tweaked a bit to be about darts, golf or video games. It's the people we meet that makes the show work. In brief, Dylan Spokes (Ben Schnetzer) is