I have a samba version of Rhapsody in Blue that I'm recording. Normally on a jazz tune like this you play the song through, then everybody takes turns soloing, then you return back to the head and that's it. A B A form.
But on this tune I'm doing a few minutes of solos, then the head, and then back to a few minutes of solos. You could call that B A B form.
There's been some great 1 chord tunes (Low Rider, Shotgun and Lime in the Coconut come to mind) and what makes the tune work is that the arrangement, the order of what happens isn't boring, it changes color enough without more chords. I really admire when someone can make a lot out of very little.