Alle Räume sind mit "yes" getagged, Funktion teils nicht feststellbar https://overpass-turbo.eu/s/2c5e. Alternativen siehe indoor=room#Examples oder taginfo https://taginfo.openstreetmap.org/keys/room#values

was für ein Raum ? way/1154844735 --> indoor=room#Examples

was für ein Raum ? way/1181334260 --> indoor=room#Examples

7 years old entry, still valid ? way/612556708 Would meanwhile be called https://taginfo.openstreetmap.org/tags/building=sanitary. Those seem all to be in the same region https://overpass-turbo.eu/?w=%22building%22%3D%22bathroom%3Btoilets%22+global&R

Either persons or pupils https://taginfo.openstreetmap.org/search?q=capacity%3A, see https://overpass-turbo.eu/?w=%22room%3Acapacity%22%3D*+global&R

Das ganze Gebäude soll eine Küche sein ? way/36211581

Check the alternatives building=bathroom, also see https://overpass-turbo.eu/s/2bJa

Not very likely in the middle of nowhere building=bathroom

Check whether sanitary fits better building=bathroom

Check whether sanitary fits better building=bathroom