I live in the basement of a converted house. There's about five flats. Tonight I had a friend round, and from 7pm, we were listening to music. Not loud, not drunk (friend is pregnant and I had one beer with dinner).
At 8.30 the upstairs neighbour came down, bashed on the window, and when I opened the door started shouting at me about how loud it was in her flat. She didn't ask me to turn it down or give any reasons, just ranted very angrily. To give an idea of volume, friend and I were sat on separate sofas having a conversation before she knocked. I apologised and turned down the volume. At 9.30 she returned, I said I had already turned it down and started to shut the door when she started trying to force her way in! I won, shut (and bolted) the door, and turned the music off. Now I'm annoyed at having to.
AIBU?! She is late 40s and lives alone as far as I know (so no children).