After some "research" into this, I have personally settled on `amenity=dressing_room`. First, it is the only tag I could find with a wiki page at https://wiki.openstreetmap.org/wiki/Tag:amenity%3Ddressing_room . Second, from all the tags I could find it has the highest use. While not by a very high absolute margin, given the small overall number of such features mapped, that is also a good indicator. * amenity=dressing_room 128 * amenity=changing_room 42 * amenity=changing_rooms 4 * amenity=change_room 1 * amenity=changing_cubicle 1 * amenity=changing_booth appears 0 * amenity=change_booth 0

After some "research" into this, I have personally settled on `amenity=dressing_room`. First, it is the only tag I could find with a wiki page at https://wiki.openstreetmap.org/wiki/Tag:amenity%3Ddressing_room . Second, from all the tags I could find it has the highest use. While not by a very high absolute margin, given the small overall number of such features mapped, that is also a good indicator. * amenity=dressing_room 128 * amenity=changing_room 42 * amenity=changing_rooms 4 * amenity=change_room 1 * amenity=changing_cubicle 1 * amenity=changing_booth appears 0 * amenity=change_booth 0