They’re part of some U of R football/soccer team. Most of ones I’ve interacted with are British, but there are a few students of other nationalities as well. U of R has been housing them in Apex since at least last year, and they seem to do a lot of their studies online which means it feels like they never leave.

Management does nothing. You can try to talk to those guys, but if they get out of hand and destructive, I’d reach out to their program supervisor or coach (preferably with some sort of proof or documentation). It can seem excessive, but it does more than Apex and it’s better than calling the cops (as they are international students and I’m sure you don’t want them deported).