I have been to one or two folk clubs that, while advertising their event, seemed less than happy that a stranger should appear in their midst.
One particular meeting I recall was poorly attended and I suspected that it was the same handful of folks each week that came together to swap songs.
I could feel their discomfort as soon as I entered but hoped that, after a song or two, the atmosphere would loosen up.
After the first ten minutes I knew it would be a long night.
I'd like to think that in their position I would be happy to have someone new join the group. Maybe a chance to learn a song I hadn't known, or who knows, maybe even make a friend. I am sure that I would be more welcoming, if only as good manners, but then it was my good manners that stopped me getting up and walking straight out!
Needless to say I haven't returned and can count these negative experiences as rare.