Smash! " review
Menier Chocolate Factory, London"Is there anything that matters less than a musical?" a character irreverently asks in this revival of the late Jack Rosenthal's 1981 play. It's not a sentiment one ever expected to hear on the stage of the Menier. But it sums up perfectly the comic anguish at the heart of Rosenthal's biliously funny piece: a backstage story based on his own nerve-wracking experience of seeing his…