Fun around town, for $10 or less: Horror with a Twist: October screenings from Andrew's Video Vault, with the theme ''What do we do with the killers we create?'' and featuring Body Snatchers (1993), Uncle Sam (1996), and The Ravager (1970) at the Rotunda (4014 Walnut), 8PM. Free Memories…: Screening of Election Day, combining 11 stories shot on November 2, 2004, at the Painted Bride (230 Vine), 7PM. $10 Martha!: The Martha Graham Cracker Cabaret......