If the people who say that certain festivals are 'dance' are meaning to imply an inbalance favouring dance at festivals, I would say that most festivals are'song' with a bit of Morris and Ceilidh added.

My favourite Chippenham has everything (as far as I can see). You could Social Dance from morning till night if you had the stamina. Learn about song and singing. Play in sessions or learn new tunes in workshops.
Oh, and lazily watch display teams and listen to concerts and maybe be inspired to do it all better.

Not that EFDSS directly organises festivals these days, though I suppose its work past and present inspires and supports them.