Declan wrote:

they are having the session they want to have

Yes, that's correct and that's their right. I just think that if they weren't so exclusive,
a lot of people would enjoy going there even just to listen (and they are quite good),
but judging by the emptiness of the room, visitors (musical and non-musical) seem put off
by their attitude (like me) and don't come back.

It's only a matter of time before the landlord will find a better use for this room and that will be the end of it...