I've got a 78 disc from the thirties (belonged to my granddad) by, I think, Jack Hylton. JH had a British swing band. The other side is Organ grinder's swing.The Juba in the song is a dance, The words, as far as I can remember:

When the folks up in Harlem do the Juba
They tap their feet like the rhumba down in Cuba
Hi-de-hi! Lo-de-lo!
But when the folks up in Harlem do the Juba
You get a rhythm you never hear in Cuba.
Hi-de-hi! Lo-de-lo!
[...]
Even old peanut vendors come from Cuba
To hear the folks up in Harlem do the Juba

It's actually in a rhumba rhythm, despite claims to the contrary; the old-fashooned rhumba, that is: it's a sort of syncopated 8/8 time, 3/8 + 3/8 + 2/8 - it sounds like 9/8 with a beat missing. I keep meaning to try slipping it into a slip jig.

Steve