Unable to answer "How many car lanes does this road have?" – Jungsøvej (Tertiary Road) – osm.org/way/415619126 via StreetComplete 58.2:

In Denmark, there's a lot of "2-in-1" roads popping up. There's only one semi-wide lane, but narrow enough that two cars can't pass eachother. On both sides there's wide biking paths, that are only delimited with road paint. All traffic can ride in both directions, and when two cars going opposite directions needs to pass eachother, they are meant to lean into the bike lane, and then afterwards return back to the center lane.

This video explains it pretty well, though only in Danish... The animation should be pretty self explanatory though. https://youtu.be/51azrFbUSFw

Unable to answer "Is this still here?" – Søholmscenen (Theater) – osm.org/node/8127622761 via StreetComplete 58.2:

An arts and crafts cooperative, but it's up for sale

Unable to answer "What kind of building is this?" for osm.org/way/586962422 via StreetComplete 53.3:

This building is part of the nearby housing cooperative. No one lives in the building, but people in the cooperative can borrow/rent it to throw parties.

Unable to answer "What’s the surface here?" for osm.org/way/362549068 via StreetComplete 53.3:

There is only a small path where the grass has been trodden down, but the path crosses train tracks, which is illegal and is subject to a fine. I personally think the path should be removed, to avoid personal injury, and people getting fined.

Attached photo(s):
https://westnordost.de/p/164960.jpg