Our band would use this feature also Arlo.
We love to give our fans the option of looking on our website from their cell phones, during a performance, and allowing them to request songs they want to hear. This feature can be a tool to generate tips also. Our band is constantly adding, and rehearsing, new songs in BandHelper and it would be an awesome feature to be able to share our progress with our fans automatically in this way. There are many songs that we perform, but our fans are unaware of them. This would add an element of interaction that we currently don't have.