F. Scott Fitzgerald's short story collection Tales of the Jazz Age was published in 1922, so jazz couldn't have been too foreign a concept.

Hmm. Things trend quicker than I give them credit for trending. Here's a commemoration of the first jazz single ever issued, in 1917:
https://www.swoknews.com/entertainme...st-jazz-single
That sounds about right, as I recall.

Cheers,
John

Update: Louis Armstrong was playing jazz on Mississippi riverboats in 1919.
Update II: here's a good piece on jazz leaving New Orleans to reach Chicago and NYC from the mid-teens, though reception was, let's say mixed: https://observer.com/2016/09/how-new...enter-of-jazz/