A very very very long time ago, back before anime was popular at all in the mainstream... A friend of mine was running a tiny anime showing room at a sci-fi con - and I hung out there with him. We took turns running the projectors...
For 2 days, pretty much straight. I slept in the room.
I don`t remember all that we played, but it was quite a lot... And back in the days before hardly anything other than Ranma and Tenchi was licensed.