I always enjoyed the opening intro to My Funny Valentine…
A lot of the American Standards songs come from musicals, which often had kind of preambles on stage to set up the song…. A way to transition from the spoken dialog to the sung refrains. You can hear it here as the preamble has a more dialog type of structure, setting up the playful ribbing of the song!
https://youtu.be/ahE7lDYRrms