The look of Riff Raff's, a subterranean bar/nightclub located underneath the Polynesian megarestaurant The Hurricane Club, is equal parts tropical (tribal masks and Malaysian textiles line the walls) and city-sleek (a disco ball hangs from the ceiling, and there's lots of shiny dark wood). The Balinese-esque setting designed by AvroKo is the ultimate party spot for Halloween 2012.