the folk dance gang seems very active

IVFDF (Inter-Varsity Folk Dance Festival) very much so. Run by Uni students with help from others. And it is popular. A different Uni each year, though certain Universities have a thriving caucus of aficionados. And it should be on the syllabus, certainly for business students, the hoops they have to jump thrugh to get it together is excellent training. I haven't been to a bad one yet.
So much popular it has spawned an ICBINI (I Can't Believe it's not IVFDF)

And Contra, long a preserve of older dancers, has a young following.