[Roy Dennis]

This is just an idea, may suit you may not. When someone gives you say 6 songs enter them all in the play list but after the first song click skip, then enter the next singers say 4 songs but after his 1st song click skip, do this for all the singers with multiple songs. Now it will jump to the next singer and not the next song. After all have had their 1st song either go back to the top of the list and un skip all their next songs and play again from the top or drag them down one at a time to below the last singer.

There is someone Else's idea in this forum if you search that uses a blackboard and chalk. As a singer signs up he enters his own name on the chalkboard for all to see and the next singer signs in after him, at the end of the list it starts again from the top. Doesn't show his song just rotation. Seems very fair way until someone wants to sing with someone else as well.
I myself prefer to just show the next 3 singers on my next singers list which gives me a chance to juggle them as I see fit.

Roy.