"Rum and Coca-Cola" is a popular calypso song composed by Lionel Belasco with lyrics by Lord Invader. The song was a hit in 1945 for the Andrews Sisters.
In this solo piano version it's arranged for a ballet class "Allegro" exercise and recorded by Peter James on his album "Music for Ballet Class - MORE Songs from the 1940s"
For more info about the album click here: https://bit.ly/3uaJza1