There are surely other alternatives Dave
As things stand, what you and others have suggested are suitable for a folk club suggests that 'song clubs' is as good as any
Mine wasn't a suggestion for a label -none of my business what others call their music - all I'm interested in is finding folk songs when I turn up at folk clubs
MacColl never called any of his clubs 'folk' just as he never claimed the title for any of his songs - he didn't have to, in those days we could more or less know what we would hear when we turned up at one
Now the clubs are not the only problem of course
When your researchers go AWOL and declare pop songs to be 'folk' you have problems on all fronts
This last is neither oogical, notr is it consistent - if it was 'The Birdie Song' would have a Roud number - maybe I speak too soon - early days yet !!
Jim