Pretty much the only late-night activities left on Disney property are the Rix Lounge (at Coronado), Jelly Rolls (dueling piano bar at Boardwalk), and Atlantic Dance ("video" bar at Boardwalk). All of Disney property is pretty gay-friendly, but if you actually want to meet gay people you'll probably have to go off property
That being said, there are several locals on the boards, so you could always try and find a drinking buddy for transport!