I know exactly how you feel about this image. If the lady on the right was not in this frame this image would have been very very nice. She is a pretty lady to boot which makes for an every bigger distraction. If there was more space between her and the dancers it might have helped but she is right there. Too bad as the expressions on the couple dancing are very romantic looking and really give this image a nice mood.
I like the concept and the couple dancing. Distractions including the aforementioned young lady and the three people in the background looking directly at the camera diminish the image. Just wondering if you had set up with a tripod, or what caused so much interest from those folks in the back.
I think I will comment further. I really think you brought focus to the couple. It is a crowd and there are others such as the pretty girl in the foreground, but my primary focus is the couple and I think the others (the crowd) offer context for one of the magical and busy scenes you can see in Latin American cities. I recall particularly a few years ago during a week stay in Cuernavaca, Mexico witnessing couples dancing the Rumba in the City Plaza. While there were many folks milling about or watching the dancers, as well as street vendors, it was a joy to take in both the dancers and their relationship to the crowd. I think you did a fine/unique job of bringing our eyes to the focus point of the dancers to help us simplify our focus yet still provide us the environmental context.
Michikon,I think this is very good but would be even better if you could get rid of all the other color in the image except for the couple(the skin tones on the forground woman,the blue tint and skin and shoe of man with shoulder strap and the woman in red right behind the couple). Then,IMO, this image would fit your title perfectly.
Just thinking out loud.. I left the upper umbrella in just the help frame the couple a little, it most certainly come out as well and become more of a 4x6 format. This does put them on the line of the rule of thirds as well.