If you want to be at a song circle that welcomes people who are trying to get over a fear of singing in public, you will enjoy yourself more if you can accept their need to have written lyrics. I would rather that people use a lyric sheet than freeze in the middle of a song. Choral groups use written lyrics; people use hymnals in church; and I have seen some seasoned professional performers use lyric/music sheets, but I won't name names!