Jake Thackray - Bantam Cock
Tom Paxton - Forest Lawn
Trad - The Sicknote (aka The Barrel, aka Paddy's not at work today)

But the one that had me hysterical most recently was Clementine sung to the tune of Cwm Rhondda. The whole thing of a roomful of guys doing their best Welsh male voice choir on "Oh, my darling Clementine (Clem-en-tiiiine)" was too funny for words, and I was having real problems singing along.

In a similar vein, the entire queue in the student's union takeaway singing Unchained Melody is close to unbeatable.

Graham.