Nottage's delightful new play, 'Clyde's,' which opened at the Helen Hayes Theater on Tuesday, dares to flip the paradigm. Though it's still about dark things, including prison, drugs, homelessness and poverty, it somehow turns them into bright comedy. In Kate Whoriskey's brisk and thoroughly satisfying production for Second Stage Theater, we learn that, unlike Oedipus and his mom, people who may have little else nevertheless have choices.