*Feels some nostalgia*
Last night I practised on a grand (luckily) by which I had to face the door. That's a big glass door sitting next to a big glass window. I realized there's a young girl, dressed in white, stood right outside the room looking at me. Imagine it's night time and it's dim outside and you see a girl in white . I stratled a bit, but soon I think to myself "hey you've got an audience". This may help practising performing.This is a performance art afterall. I miss my piano at home.
Great topic. One time I was practicing/learning a Bach invention and the person in the room next door stops what they were doing in the middle and plays something from the Well Tempered Clavier. I'm thinking "Wow, you win the 'I'm Really Pathetic Award'" by showing off to somebody who is just starting out...But it didn't bother me, because if he was so intent on listening to me, then he got it worse than I did :-). If he is so good, then he could try concentrating on his own stuff.I mean, do they just sit around and wait for somebody to start playing and then play something "better" to put that somebody in their place? As I said, pathetic.
Maybe they're trying to communicate. Happy to hear something they know, so they play back a bit of it. Like dueling banjos. If they do it again, maybe play the opening of the dueling banjos back at them.