The Christmas party I went to last year was legendary. My internship was with a local non-profit organization that was run by extremely young people (my direct supervisor was the oldest at 32).
We all chipped in for the party to be hosted at a nice local catering hall, and they decided that it'd be open bar. Well, a couple of hours and quite a bit of alcohol later we heard some screaming. I heard something similar to this (leaving out the harsh language, but I'm sure you can imagine):
Employee: You think I'm (sleeping with) your husband?!
Wife: Yeah!
Employee: I'm not, BUT SHE IS!! (pointing to another coworker)
Then came the drunken catfight. We talked about that one for weeks.
This year I was invited to the office party (different internship), but I'm thinking it won't nearly be as eventful- it's with a politicians office, and I can't see them being the type to have a Jerry Springer-esque party.