Generally, I prefer more low-key get-togethers with a small number of friends. Video games, movies, playing Magic: The Gathering... Those are good for me. Parties can be enjoyable as well, but I don't like anything crazy. None of the nonsense you see on a college-humor movie. More along the lines of friends drinking, and having fun together.
I'm not a huge fan of going out. I dislike bars and clubs very much. The environments make me more anxious than I wish to be.