Terrier, I've sung all sorts of "unusual" songs in folkie places, songs like Fields of Athenry, Nelly the Elephant, Wild Rover, When I'm Cleaning Windows, I'll Join the Legion, Nobody's Child, Runaway Train, She Wears Red Feathers, etc, etc and I've never been told off or asked why do you sing 'those' sort of songs.

Maybe it's the singer, not the song. :-)