Yonsei Social Experience/Mentor's Club?

Hi! I'm planning to study abroad in Korea in Fall & am looking for information on Yonsei's social culture for international students. I couldn't really find one consolidated thread on what social life is like in terms of meeting people.

I'm the most worried about making university friends. I know this is pretty luck dependent, but I am also not the type to go out to clubs/bars & make friends there – I would rather make friends in classes or university clubs, and go out with them.

I know Yonsei has the Mentor's Club program, but I was thinking of trying to switch to KU's program since I heard a lot of good things about KUBA and it seems more structured/involved. I also want to be able to meet at least some domestic students & the segregation I've heard about at Yonsei worries me a bit.

I will be attending through UCEAP if that makes a difference. If you've attended Yonsei before, I'd love to hear about your experience - thank you!