The Old Vic, LondonRami Malek's outsider vibes enliven seamy, superb new staging of Sophocles' family tragedy Dance in Greek tragedy " why not? The ancient Athenians did it, their choruses a weave of sound and movement, though no one really knows what shapes they threw back in the fifth century. They probably didn't give the hands-in-the-air delirium of Hofesh Shechter's spectacular dancers in this new version of Oed…