The worst piece of rudeness I ever saw shown towards a fellow performer was thrust on us by the great Bob Davenport at The Musical Traditions Club in London about ten years ago.
The guests were two Irish singers; Roisín White from Armagh and Therese Mullan, a Sean Nos singer from The Aran Islands.
Therese thoughtfully took the trouble to give a short explanation of her Irish language songs - our hero pointedly spoke loudly over her introductions.
We heard him say "I thought we'd got rid of this pretentious shite back in the sixties".
When we asked him to shut up he replied loudly, so the whole room could hear, "I came here to listen to singing, not f****** talking".
Jim Carroll