Too talented and successful an act for Broadway Danny Rose (but almost as kitschily inspired as piano-pecking birds), these three middle-aged sisters create a delicious platter of unintended camp by blithely bringing their ’40s vocal stylings to bear on a bizarre program of material. After covering easy-listening classics like “Hey Jude” and “Light My Fire” for starters, the guitar-strumming Del Rubios move right into sublime weirdness with selections from the Bangles (“Walk Like an Egyptian”), Pointer Sisters (“Neutron Dance”) and Pet Shop Boys (“What Have I Done to Deserve This?”).