There is no 'mass concensus' for any definition of folk music - we've never managed to engage the masses.
The only times we even approached doing so was when Sharp got the songs accepted in the schools, where they were hammered to death by Miss Pringle on the school upright - and during the folk boom when is was represented by The Clancys and The Dubliners and The Spinners.... none of which were perfect but were all far nearer the real thing than the 'make-it-up-as-you-go-along' approach being proposed here.
I'm wodering where does one go for accredition to be a 'designated folk context'; fill in an application form maybe, sit an exam, give the EFDSS a bung....... no, seriously!!!!
Still no answer to my 'exclusively folk venues' question - I'll take that as a 'nowhere' then.
As for the Dog and Duck v Pindar of Wakefield definition.....
You're 'avin' a larf!!
Jim Carroll