I think there is also a stigma and fear associated with approaching someone today. No one wants to be seen as a creep or to find themselves on social media branded as one. This frightens me very much.
> I don’t think there is anything stopping people from talking to other students while drunk at parties
Usually the music is so loud that you have to scream into someone's ear to be heard. Also a girl with her friends who is approached by a random guy will usually say no simply because she doesn't want to be perceived as easy.
However, talking doesn’t have to lead to dating. It can just lead to hanging out platonically in large groups, then hooking up casually.