Decades back I had a letter published in Melody maker pointing out that the reason danceable music (not necessarily disco) was more popular in universities was sex.

Until folk music is seen by the young as a more direct pickup route than other music, folk clubs (including the one I help run) will be dominated by wrinklies like me.

Likewise while society's pecking order influences access to the opposite sex, the young, who have still to obtain rank in that pecking order, will prefer a different society.