Sooo, it is not as convenient, but I usually search for ho(s)tel/B&B/etc. on openstreetmap and then check their own website or call them directly when I found something in the correct area.

Twint is Swiss though, they have some phobia of EU-wide things.

If you like open source projects, have a look at the banglejs. It can do most of what other smart watches do, but privacy friendly, and with a runtime of about a week per charge. However, it is less flashy/shiny and a bit more experimental than the Apple watch and the like.