It does depend on the setting as said by enajay.

I was asked to do a spot after the main act. Never a good move.

I sang one song, but as the audience was more interested in talking by now.

I just said, "The trouble with sitting up here and singing whilst you're all talking, is that I can't follow what you're talking about."

Then I got off the stage.

As I said they were more interested in a chat after having an hour of the main act. So you can't really blame them.

Chas