General lighting looks pretty good, but shadows! Where are the shadows? Not even on the clothes... Either the ambience is too high or you've put too many lights, but the picture looks flat. There's no contrast. I'd pull the camera closer to the pair, so you have them in the so called American View, down to the knees. Or better yet, pull them closer to the camera, so you don't lose the details behind them. (The details are very good.) That way you'd solve what Flak says, about the empty left side, cause it wouldn't matter anymore, and isolate the two of them in a private moment amidst all that noise and crowd. That way, you'd have a clear focus, and not just a general picture of a Confederate dance. I think you intended that, right? Finally, the chandeliers should have some kind of visible light in them, shouldn't they? But you can add that in PW.

-- erlik