Just two tiny things (because this is really spectacular): the bottle looks like it's about to fall off the table. You might want to pull it back. And the shadow it casts on the floor makes everything else look out of scale -- in RL, that shadow would have diffused, if not outright disappeared from the effect of the other light sources. I think you can lose it and not miss a thing. I might pump up the dancers' reflections a tad and, as someone else suggested, put some paintings on the laft wall (big ones, to completely fill the space, as they did in that period). But good job!