I think we, as a society, have taken jazz as far as creative licence allows us whilst sticking to the regimented and frankly old-fashioned system of having people attend shows in order to see it. It's why it gives me great pleasure to unleash the artistically-valid yet somewhat whimsical notion of "Surprise Jazz" upon the nation. Jazz is limited by the expectation that jazz will happen, and I enjoy the concept of unpredictable jazz. Consider it a live version of jazz unexpectedly coming up in "Shuffle" mode on your personal choice of media player.
Basically, across the country, small jazz groups (Quartets or quintets, maximum) carefully attire themselves in bush camouflage, and hide, unseen, behind benches in the park. Perhaps a couple of old ladies sit down to feed ducks and discuss their grandsons, and, I dunno, the latest advancements in blue-rinse technology, I don't know what little old ladies in the park talk about. Anyways, it's at this moment that the Surprise Jazz quintet strike, leaping from the bushes and playing an assortment of jazz classics (I'd open with Dave Brubeck's Take Five) to the delighted nans. They'll talk about it for weeks. "We were sitting in the park, discussing cardigan prices, when, suddenly, jazz!". You will not only brighten their day, but I'd dare say make their week. The unexpected element of the jazz will only heighten their joyous delight.
I've taken the liberty of making up several reviews from mainstream papers, this is what they might have to say about this concept:
"Bigger and more artistically daring than the early punk movement" - The Times
"Unprecedented artistic freedom playing to an unsuspecting audience gives the quartet whole new directions in which to take jazz that were previously closed to mainstream forms" - The Independent
"Immigrant music ruining our parks!" - The Daily Mail
"Conceptually brave, smashing the cultural conventions that jazz belongs in jazz clubs, this new medium opens up a whole new world to jazz, one which deserves to be fully utilised by modern jazz musicians and fans alike" - The Guardian