I dunno, do you guys like trivia? I was on the Quiz Bowl team in high school, so this website is essentially just an electronic form of that. Basically, it runs through a paragraph long description of something, when you know what it is you press space and type in what you think the answer is. You can only buzz once per question. It's a lot of fun, and all you have to do to make a custom room is add a name at the end of the URL. You can adjust the split of question categories on the right side of the screen. Trash is another name for Pop Culture, so that category is generally a lot of fun.
If you want to play with some people online,
http://www.protobowl.com/lobby is usually well populated. But those people are kinda difficult to play against, I don't fare that well usually.
http://www.protobowl.com/hsquizbowl is a little easier.
Here is a link for a custom McLeodGaming room, if anyone is interested.
http://protobowl.com/mcleodgaming