Howard I even remember going to see Steeleye Span in the Student Union main hall, and even then in the absence of chairs most of the audience preferred to sit on the floor (although a very few jigged around in the corner, and I think were considered a bit of a distraction).

Hmmm, Ths Steeleye gigs I went to were sometimes standing only, and many, even most, people danced. In fact, Maddy P would sometimes come into the audience and grab people to dance with herself. Including myself on one memorable occasion.