Can anyone breakdown the social aspects of all of these colleges for me?
I would say in terms of parties it would rank as such:
BU
Rochester
NEU
I go to BU so it may be biased. I have found that all a lot of the parties in Boston take place extremely close to BU. Northeastern students can be typically found walking around BU at night to get to parties as there aren’t that many happening over there. I’m not saying that NEU is completely dead, but BU definitely has a more lively atmosphere at night. Rochester does have some good parties apparently and its easier to drink there as it isn’t in such a big city like Boston and its less strict. BU has more schools in its vicinity so there are obviously more parties. This is entirely subjective and I wouldn’t just take my word on this. Keep an open mind and check out what other people will hopefully say as well! All 3 schools do have a fun social life so don’t dwell on which is better, but the one that you see fitting in more because they are all different 
@chaplin100 If you are looking for a balanced opinion why did you only post this on the BU thread? You are currently a student at Rochester so you should be familiar with social life there.