It isn't that I am entirely antisocial as such, I can handle meeting one or two new people at a time while in a group and I'm generally comfortable around folks I know, moreso in smaller groups (ten or so) but in situations where I am surrounded by people I don't know (like in a pub) or where I end up talking to two or more people I don't know I tend to freak out and hide in my room, or in a corner. Usually all of this is not a problem if I know the person online or the like.
So with one new person I can chat perfectly well with them about a variety of nonsense topics (except sports) and be witty and charming and probably dead sexy. When I have to talk to two new people I lose it and my definition of "witty" seems to involve saying things like "probably because you're a c**t AHAHAHAHAHAHAH!!" This seems to be made worse when the french are involved for some reason.
As an aside, my boss just used the phrase "Hairy clam".