Why did folk clubs multiply in the 60s & 70's?

The reason I ask is that I enjoyed folk clubs in the 60s & 70s and I think it would be good to understand why they worked then - only to collapse in the 80s & 90s.


1. The effect of Skiffle – revealing a genre of music quite different from chart pops
2. The regional effects of groups like MacColl & Seeger & friends, The Spinners, The Ian Campbell Folk Group, The High Level Ranters and others
3. An available collection of folk songs via magazines, books and EFDSS/CSH/RVWML
4. We could sing unaccompanied or with simple guitar chords AND without a PA
5. Rooms were available in pubs – young people could quietly have an under aged drink
6. The rest of us could simply drink
7. Chart pops were looking at blues and folk – Dylan, Donovan, New Seekers, Peter, Paul & Mary.

Any other views?