If you have locked anyone out of your performance for any reason- financial, cultural whatever you are simply being selfish and greedy.

What about the reason being "they" are simply unable to relate to the music? Most players I know would be more than keen on perhaps lending a recording in a couple of cases a spare instrument to get others involved. I think the general way is to wish others can enjoy what you enjoy.

But you (at least I think so) can not force it. I (not that I'm close to this league) was once with an All Ireland Whistle player and more than adequate fiddler and we tried an informal small gathering. Only 3 sets and the locals wanted the juke box back on. Shame as the 2 players on this occasion were top class, but there is no way you can force (eg. "you must listen as I say these people are world class) on another.