We have always found Guest Nights difficult, I think in part this is due to having to charge an entrance fee. Personally I wouldn't blame anyone for not wanting to pay between £5 to £10, for someone they have never heard of. The Biog's offerred by Artists and Organisers alike are notoriously overstated and once you have been caught a couple of times you tend to give unknown artists a miss.

So how about the idea of making entrance to your guest nights free, and asking all those present to make a sensible contribution to the Artist concerned depending on how much they enjoyed their performance. Its not ideal I know, and it wouldn't work in big clubs, but it may be the only way of continuing Guest Booking in the smaller and dare I say it average Folk Club..