The real novelty, however, comes every time an unseen orchestra starts up and, in turn, the cast burst into song and sometimes dance steps. It's a tuneful break from the sort of acting which suggests that inside each member of the household is a hysteric trying to break out. Forget the inbetween charade and you may enjoy the cabaret, particularly 85-year-old Mme Darrieux, as wrinkled as a walnut shell, but crooning: "Il n'y a pas d'amour heureux" like some rhapsodic immortal.