I like some parts of this render, but not others. I think the main model needs to be more front and center, and I have the exposure too high - everything is too bright, which makes it too busy. Would probably need more spotlights. Ideas?
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Render it as a TIFF and open it in RawTherapee, where you can watch if you are over-/underexposed and adjust it accordingly. The same goes for colours, sharpness, crop etc. it is an open-source alternative for Lightroom.

And yes, do the edge patrol. Crop everything out that sneaks in and draws the attention away from your subject. The Keg is an example, so is the arm and dress of the dancer on the left, just to name a few. Another route you could go would be, blur the background more, to separate her further from the environment.