A New York politician says comedians can't survive in Manhattan on the money they make telling jokes. So Assemblyman Adriano Espaillat is sponsoring a bill requiring comedy clubs to pay stand-up comics a minimum wage of up to $120 per weekend set. But club owners aren't laughing. Then again, neither are the comedians. Since the bill hasn't got a backer in the state Senate, it will probably, like many a one-liner, fall flat.