Either that or it's by Rumbatá, which I know exists but which is a Colombian big band and has a somewhat different sound, from what I have heard -- more brassy. But eSnips says the tune is "Rumbata."
More than this I do not know. (Thank you, eSnips and eSnips members.)
Summer music for sitting on the plaza with a cool drink. You can dance to it too, though it's a bit lounge-y, but in a good quick swinging Latin sort of way.