Some are outgoing and some are not, as with students at any university!
The people on my floor are really sociable, and we go clubbing quite a bit, but of course not everybody is into that.
My favourite clubs round here are Tiger Tiger and On Anon, but there are loads of other decent clubs too. Although it is best to go clubbing on a week night, as weekends are hella expensive; even if you go to the same club on a student night and then a weekend, on the weekend the drinks prices are hiked right up.