In the late 1970's I was in the KeithMel Co. and we played at the following...
Rose and Crown, Stalybridge
The Woodlands, Cheetham Hill
Whute Gate Inn, Hyde
The Ash, Hazel Grove
The Nook, Reddish
The Three Crowns, Reddish
Hat & Feathers, Miles Platting
The Britons Protection, Manchester City Centre
The Star Inn, Salford
The Fir Tree, Reddish
The White Lion, Withington
The Eagle and Child, Whitefield
The Three Tuns, Hazel Grove
The Victoria,Middleton
We set up and ran a folk club at The Cheshire Hunt, Gorton, helped set up one at The Railway, West Gorton and had a regular residency at The Pen and Wig, Salford. So maybe these can be added to your list of venues?