Patrick Marber’s play is a jaundiced look at masculinity and shows how men fail at being fathers, sons and friends. During one night of poker the game itself becomes a kind of weapon which the play’s characters use to goad, taunt and humiliate each other. But the portraits presented, though far from flattering, have a good deal of subtlety and depth: occasionally one of the six anti-heroes will wrong-foot the audience by some small display of sympathy or even kindness.