I just got back from an airbnb in Amsterdam, where the windows in the bedroom literally had keyed locks on the inside on the windows. They look like normal window sliders until you look closely and happened to notice a tiny keyhole. I never found any key the entire week I was staying there.

Could I have gotten out in a fire? Probably. But it's definitely less obvious and less well-equipped than in a hotel for Directing unfamiliar residents out of the building