I would agree with Raggytash here. If I'm going to pay money to see someone perform I expect them to do the job and provide entertainment. After all, it's the audience who are paying their wages, be it a guest night at a folk club or a gala night at the Royal Albert Hall. The audience deserve the respect of the performer in general terms and if any performer is abusing the priviledge then I don't want to give them my cash - there are plenty of GOOD performers I would rather spend money on - or waste my time watching them.