How to tag an outdoor stage

Building=roof, like the cover of a gas station is enough for the building, the other suggestions for its specific use such as amenity=theatre;bandstand & are fine. The semi colon is added because OSM wont except 2 amenitys. Most of these kinds of buildings are multiple used by different societies for music or theatre.

building=roof seems like a good idea. @asserel4c26 I agree that amenity=theatre is not very accurate, but instead of amenity=stage, perhaps it would be better to tag it as man_made=stage

I was thinking of building=roof too, but did not use it as it is not just a roof. There is also the stage floor itself and some poles at the corners.

@Hendrikklaas, please see our documentation about the semicolon. It is not unproblematic here. I would recommend to only use one, the more important one.

Hmm, I just realize that covered=yes may be be that useful here. Since there is also a building tag on the same object one could think that the building it covered, which is not true. So it rather should be something like stage:protection=roof. Hmm, hmm …