After successful editions in California, Arizona, Texas, and Florida, things are about to get spooky up in Seattle this October as Insomniac Events is set to bring BOO! Halloween to the city for its debut edition. Set to take place on October 29-30 at the WAMU Theater, BOO! Seattle might be the newest in the series but is already beginning to pack quite a punch with a stacked lineup of house and bass artists in tow.