Villan,
       In answer to your question concerning the age group of those that ran and attended folk clubs and the like in the 60`s/70`s, from my experience we were all predominantly youngsters with a few notable exceptions. By that I mean we were all in our late teens to mid twenties. I base my observations on the London and SE areas where clubs existed in just about every borough. If you see the old films taken in places such as Les Cousins, the song sessions with Ewan McColl and Bert Lloyd, and the t.v. audiences when "folk music" was featured I think you`ll see what I mean.

   The pleasing and remarkable thing is that so many of us who were of that era have grown with the movement and are still here to enjoy its attraction.