I should add, after reading the other comments here, that it's definitely 3. The notion of being "art-y" sticks in my craw, and would seem out of place if you a

I should add, after reading the other comments here, that it's definitely 3. The notion of being "art-y" sticks in my craw, and would seem out of place if you actually observed the process of preparing for a performance, and the performance itself. You wouldn't guess that it was a jazz performance by looking at or talking to any of the participants. The things that propel this activity are really pretty primitive: A love for the music itself, a feeling that it "deserves" to be performed, even if to a limited audience, pride in the craftsmanship involved, and the social hang.