If you expect all theatre from South Africa to be earnest and politically committed, think again: David Kramer and Taliep Petersen's musical, seen last year at the Tricycle and transferring to the West End after a return run there, is as light, insubstantial and refreshing as a summer breeze. In 1957, young Kat Diamond and his band the Cavalla Kings sing and dance their way on to the doo-wop bandwagon sweeping Cape Town. The show is based on the memories of Old Kat (Salie Daniels), who nostalgically narrates the story, as well as showing his younger self a few smooth moves. Check your brain in at the door and enjoy.