I see your point, Diki. It would be impolite, at best, to try to conduct a pro seminar in any style of music at a party/entertainment venue
(bar, restaurant, etc.). I guess, then, my question is, how do hard line musicians make the choice of when to entertain and when to further the art form and introduce the "new and improved" end product to the public? 
Is is worth dedicating your life to furthering the art form and suffering the consequences?(reduced jobs and income, less appreciation, etc.). Is there a compromise position where you can do both?
Again, we're talking about an issue that would matter to an academic or 100% musician and less to entertainer/musicians. 
I really enjoy assisting young players understand more about musical history, structure and historic pieces of music. 
And, I tend to choose a quiet restaurant where I can play more complex jazz standards, knowing the money and audiences are smaller. 
But, I'm not an entertainer, and that always enters into the venue and material choices.
Perhaps it's enough to do what Rory, Montunoman and, I'm sure Diki, Chas and others do...find a middle spot. Play recognized materials, with sophisticated changes, and hope "someone" out there recognizes and appreciates the effort.
Russ
[This message has been edited by captain Russ (edited 05-18-2010).]