As a Canadian, I'm always somewhat amused how fire code is strictly enforced at events in the US. I've often seen inspections during conferences. US and UK have a much stronger fire code safety culture than elsewhere (although, as most things in the US, it can vary greatly between the big cities and more rural areas, including suburbs or sprawled cities like SF).

SF isn’t really a sprawled city by American standards. The cities outside of SF are sprawled (like San Jose) but SF is pretty compact in comparison.

Good examples of sprawled cities include LA and Houston.

I don’t know anything about Europe, but most escape room owners in the US can report multiple visits by the Fire Marshall. (I just got back from the national conference and talked to a lot of them.) It varies by municipality, but most places in the US pay more attention to escape rooms than the average business. They’re probably more safe than the office suite next door to which nobody pays attention.