I find they work too well. I sing several and they get requested so often that I have difficulty when trying to introduce a serious song - people automatically start laughing.

Try....
The Sow Song
Widdecombe Fair
Manurah Manyah
Woad
Liverpool Barrow Boy
Henery The Eighth
Blaydon Races
One More River to Cross
Oh No John
Strawberry Fair
Drunken Sailor
Whiskey Johnny

Bert.