During my first visit to a folk music event in 1964, someone sang Shoals of Herring and the way the audience joined in the refrain just blew me away. I can recall being mightily impressed when I first heard Nic Jones perform "Billy Don't You Weep for me" accompanied by that driving bluesy guitar riff. I also have very fond memories of seeing Dando Shaft at Les Cousins. But, probably, top of my list would be seeing Hedy West in folk club in Ormskirk(?) in 1967. Great stuff.