Clarendon Ballroom on Friday, October 31. The annual DC 101 Elliot in the Morning Halloween party is the best night of the year at Ballroom, with party goers in creative costumes packing both the dance floor and rooftop to compete in the $3,000 grand prize costume contest. Last year's winner was the Invisible Man homemade costume.
The night starts at 8pm and cover is $15 before 10pm. Usually there will be a line wrapping around the block to get into Ballroom, so try to get there before 11pm. For costume contest rules check out DC101's event page.