A North Beach institution and the longest running musical revue in American history, Beach Blanket Babylon opened in 1974 and is still one of the top things to do in San Francisco. More than 30 years later, it still sells out nearly every show. The secret may be the constant addition of new material. BBB adds new spoofs, parodies, and references to current events and popular culture, so the show is always fresh and relevant. The music is infectious, the costumes outrageous, the jokes silly, and of course the preposterous hats keep getting bigger and bigger. Beach Blanket Babylon is all in good fun. Most of the seats are first-come, first-seated, so arrive early.