Is there an instrumental version of "El Tango de Roxanne"? The original was a song by The Police, but in reggae rhythm, and the version that appears in the film, Moulin Rouge, certainly isn't instrumental - it makes a very dramatic tango, but if you hadn't seen the film, you would find the vocal treatment rather odd!
Incidentally, there IS a good danceable version on a CD published by the BBC as a spinoff from Strictly Come Dancing, sung (very successfully) by Tommy Blaize. It can be bought from Amazon for less than £5, and is one of the best value dance disks currently available (even if one or two of the tracks are not quite so good - notably those sung by octogenarian Bruce Forsyth).