> Outside of a pub (which is a bar?) none of these places would typically be open on a late Fri/Sat.

How late are you talking about? I'm looking at the weekend hours now in my city.

Board game venues: 2AM.

Escape rooms: Midnight - 1AM.

VR: Midnight

Meetup/Couchsurfing: I've been out to 5AM.

Rooftop/outdoor movies obviously don't start until after dark, and then they usually serve alcohol, so people hang out and have drinks after.

Bowling: 2AM