I don't know about hermetically-sealed atmospheres - well, actually, as an engineer perhaps I do, and in this context it sounds bollocks to me - but I do know that I do not want to go out on an evening to listen to blues. It seems only sensible to choose to pass my time in an environment where I am likely to encounter the kind(s) of music I do like, and to avoid those where I am not. I've been known to survive music that is not folk on even the broadest definitions, and even the occasional (Good Heavens!) blues or country.

Equally, it seems sensible for you, Captain Swing, to display your presumed talents to an appreciative audience rather than to me. Good luck: but to badmouth those of other sensitivities makes you appear callow and selfish. I don't suppose you care to play in front of audiences who prefer chamber music, brass bands or symphony orchestras either. It's all that pickled and preserved music, all that exists outside your own little world. I guess they are not realistic enough.