Most of the clubs in which I play, and one one that I help to run, there's no admission fee. There's a collection at half time with a jug, sometimes with a recommended donation. So - free to get in, costly to get out!

In that situation it's not always possible to tell who's a guest's friend, who's a friend of a friend, etc. People just put money in the pot or they don't. Our guests understand the payment basis before they agree to perform, as I do as a performer.

The Question, in that case, doesn't reallt arise - it's an honour system.