why not carry our guitars down to the opera house and demand to play. sounds ridiculous but this is pretty much the basis of this thread.
Go to a folk club and expect folk music (the definition of which has been done to death), go to a jazz club expect jazz not native american flute music.
For anyone who can't find an appropriate venue set up your own.
Let the grey areas between genres remain grey as these are fertile grounds for musical development.
john