Interesting idea! I didn't even think of that.
When I worked in commercial radio, the on-air software my station used had exactly this feature. (For playing some Pink Floy songs, or the Beatles' "Sgt Pepper / A Day In The Life" and others..)
Something like that COULD come in handy.. A simple integer flag, which the # entered woulf be the FID of the next song to play..

Me.