I will just say it is possible to go to the wrong apartment. When I lived in Germany on base I lived in a 4 story apartment building and I lived on the 3rd floor. I can’t even tell you how many times I would walk into the apartment on the 4th floor by mistake because I was not paying attention. Thankfully my neighbors up there were nice about it.
Once you pull out your bang stick and start shooting up the place they tend to be a bit less forgiving.