Agree totally with Michael. I'm actually giving a series of further education classes on English folk song right now, and I like to imagine they're entertaining. Different audiences - folk club, concert, pub, workshop - demand different kinds of 'entertainment' , and a good professional can gauge that. For instance, if I went to see say Jeff Warner at a local folk club, would I want to hear his great stories about the songs his mother and father collected and the people who sang them, or a stream of chorus songs interspersed with one-liners? Know what I'd prefer.