_**Amusing spoof of Hammer's vampire films**_ "The Vampire Happening" is a West German horror/comedy from 1971 (the German title can roughly be translated as "You Only Get Bitten at Night"). The beautiful Pia Degermark plays a double role as an American actress who inherits a castle in Transylvania and discovers that her grandmother is a vampire who looks just like her, albeit raven-haired, also played by Pia. Some of the inhabitants of a nearby monastery and girl's school join the ranks of the undead and the vampires throw a helluva costume party where Dracula shows up. The movie combines…