@Mame,
Mame, you're learning to live in a new community. They're behaving the way they do. You're not used to it and you're over-thinking it - a lot.
They're letting you know they might be interested. They're not going to care too much one way or another whether you say yes or no. They may ask you a couple of times (sometimes it gets to be a bit of a fun game for them), but they're not that fussed about it bottom-line.
If you're having problems with their interactions with you, you might want to consider staying away from the musicians' get-togethers.