Dress clothes are not necessary for any of the resort activities on NYE (and, in fact, would be out of place). The main event is a family-oriented party around the pool that begins shortly before midnight and has a HH version of the Times Square ball drop. There is a dance party that occurs both before and after the ball drop. Very informal and high energy. There is also a kid's party earlier in the night where they make some of the stuff for the ball drop party.