Er yes?
There's plenty of things one can do.
Don't pay any heed to the comments you will likely receive from some people that you haven't lived if you don't drink/get drunk. Alcohol is not a necessity for fun. However, you can still try clubbing whilst sober? I'm one of those who ends up acting drunk when I'm not drinking at all.
Otherwise, plenty of societies have nightly events you can go to, especially if it's a City based Uni. Or go out for meals with mates?
Source - a person who hasn't drank at all in his life