We had friends at Bristol uni, so we went to Bristol 4 or 5 times in my first year. But if we hadn't then I don't think we would have bothered: its not really worth the hassle just to get smashed in a marginally bigger nightclub. In you first year you will probably only go to town about 2 or 3 times a week - theres more than enough entertainment on campus as it is. Obviously 2nd year onwards things change.