Many years ago, one of the regulars at the folk club that I run rather surprisingly brought his landlady along from the house where he was lodging.
"She needs cheering up." He explained. "Her cat died yesterday and she is feeling very low. I brought her along to help her forget it."
It seemed to be working until the guest singer launched into the song that starts:-

Our old cat died last night
Me wife says to bury it out of sight
But we didn't have a garden;
We was livin' in a flat
So what was I to do with the body of a cat,
Then a big brown paper bag I spied
I put our old dead kittycat inside.
And now I'm off down the street with the body in the bag,
The body in the bag, ta ra ra.

Not his fault, I know, but for that night a Bad song choice at a gig.