This earworm, marimbas (I think) and female harmony singing “cool, cool samba” (again, I think), had drifted in and out of my brain recently. Such a fragment is resisting searches. Quickly it became evident “cool samba” is not the real lyric. There is a small bit of certainty – it is from the 80s, probably early to mid-80s.
Gar! What is it?
Update: Found it, Cruel Summer from Bananarama. My earworm did not include the bass line with the marimbas.