Well, Wilfried, it isn't a folk song, but you're not likely to find it anywhere else:

Rum and Coca Cola
Words by Morey Amsterdam
Additional Lyrics by Al Stillman
Music by Jeri Sullivan and Paul Baron
©1944, EMI Feist Catalog, Inc.

If you ever go to Trinidad,
They make you feel so very glad.
Calypso sing and make up rhyme;
Guarantee you one good real fine time.

[Chorus]
Drinkin’ rum and Coca Cola;
Go down "Point Koo-mah-nah,"
Both mother and daughter
Singin’ for the Yankee dollar.

Any visitor to Trinidad
Can have good time he never had.
If he come just for rest, okay.
Then he lie around in sun all day.
Chorus

(Morey Amsterdam was on the cast of the "Dick Van Dyke Show" on television. Amsterdam reportedly lost a copyright infringement lawsuit, and the song was actually written by a calypso singer - or so the report says. It was a hit for the Andrews Sisters.)
-Joe Offer-