Back in The Bad Old Days when I used to carry a Saxaphone around , I was often asked if I played it- " No , its just for Ballast and stop me being blown away in a gale"
What Music do you play was usually the next question - "Jazz" !

"I dont like Jazz" was agood start to what they DID like , and usually you found that at least one form they liked was , in fact a branch of Jazz .

Same thing applies to ' Folk ' when you consider what a wide range 'Folk' covers .