I overhear a lot of comments about people who need cheat sheets. Some of them are not kind, such as," book carriers" or, those book people.IMHO there two kinds of people, performers, and entertainers. If you need a book of all your songs, you are a performer. (Not that there is anything wrong with that) Actually, I dont hear such comments from audience members, just from other entertainers. It really doesn't look professional, but, professional folksinger is an oxymoron anyway.