Start planning your costume now—L.A.'s favorite public radio station, KCRW, has brought its legendary Halloween masquerade ball back from the dead for another year at the MacArthur (formerly known as the Park Plaza). Expect to find a labyrinth of sensory-stimulating themed rooms showcasing circus troops, DJs, ghost stories and, of course, boogying masqueraders. There will also be an array of food trucks on site to satisfy your post-dance midnight hunger. The event is 21 and over, so be sure to leave any trick-or-treaters or college freshmen at home.