Nonstop theater, a costume competition and ballroom dancing will bewitch the East Village October 31 in the Village Halloween Costume Ball. Customarily over 1,500 wildly clad celebrants gather for big-band dancing, dining, showing off costumes and viewing acts from the cutting-edge of Cabaret and Theater. Outdoor entertainment, free to the public, will start at 4pm. Once inside, everything is free except food and drink, which are graveyard dirt-cheap. Doors open at 7:30pm and indoor entertainment begins at 8pm. There will be two continuously running cabarets offering theater all evening. Big Band dance orchestras begin at 9pm. Costume competition with celebrity judges begins at midnight. Costume or formal wear is required.