Sold out isn’t exactly the right term, since admission is free. But regardless: the supply of tickets to Sunday night’s inaugural ball, during which Vince Gray and others will undoubtedly attempt to set the record for most people simultaneously hand-dancing in tuxedos and evening gowns, has been extinguished. Nikita Stewart reports that the Convention Center ran out of the 7,500 total tickets it had to give away at 11:05 a.m. this morning. Gray’s ball is expected to host approximately 10,000 people on the whole — that’s a slight decrease in attendance from Mayor Adrian Fenty’s 2007 bash (15,000 guests), but still a lot more partiers than Fenty predecessor Anthony Williams had at his 2003 celebration, which only attracted 3,000 people. Of course, Williams charged attendees $35 for the privilege of getting in the door; Fenty’s party was, like Gray’s, free.