I have nothing to add except that this was my experience too. Of the hundred or so people in my year of my course, i am still in touch with (1) the guy who also

I have nothing to add except that this was my experience too. Of the hundred or so people in my year of my course, i am still in touch with (1) the guy who also joined the science fiction society when i did, (2) the girl who ended up doing a PhD at the same institute as me after we graduated, and (3) the girl i dated after we got chatting after practical sessions. I'm still in touch with a couple of dozen people from the science fiction society, though!