Hey @LewisDavie,
That’s a great idea! There’s another feature request that’s similar to yours: A Gig has several "Sets" -- assigning songs to "Sets" (within a Setlist)
I’m planning to implement a feature that allows you to add non-song items like delimiters or notes to the setlist, but this will take a while as I’ll have to rewrite the setlist data structure from scratch.
In the meantime, please let me know if you have any further suggestions! 