Every uni I’ve been to (and it’s safe to assume the vast majority of others) have societies for black, Asian, ethnic minorities and most religions so you will find others
As far as drinking goes, nobody actually pays that much attention so you won’t stick out as such. Plus there are plenty of students, myself included, that just don’t drink bc they don’t want to.
Most unis do sober events and even if you do go to a drinking social, you don’t have to drink. Plus some people may need a sober friend to help them get home