I agree with Hesk-we have a club which fortunately has a very high percentage of good performers-nearly all in fact. We have a people come just because they like the atmosphere and the sense of well being it leaves them with. We have seen huge improvements in some novice performers given the encouragement of a friendly and supportive audience even if their initial efforts were not that good. On a guest night we limit support to 2 club members and the expectation is they will come prepared. Whether they have a songsheet to my mind is irrelevant. If you don't like song sheets close your eyes. I used a songsheet for years and still do on occasion because I don't always want to sing a song from my gig list. If people murder a song-which is rare we have the good grace to laugh it off and look forward to the next singer!