I have been listening to your .mp3 for a couple of times. To me, it sounds like a rather loose interpretation of the tango Ojos Negros Que Fascinan. I may be wrong, but at least the intros are pretty similar. It's probably DeVol's interpretation of a tango, more suitable for movies. This song was famous outside of Argentina too, I also have a Russian version of it.
they do have some similarities,but i think you answered my question.I know nothing about tango music,so i thought it might be a famous tune.You seem to know about tangos so ,it has to be some original score for that scene in the movie by DeVol,obviously inspired by general tango music,and in the style of ballroom like UKDancer says. .
Thanks for helping me out.