This expressionist oil painting has taken some inspiration from Degas and his paintings from the perspective of being back stage, waiting in the wings and observing the performers, usually dancers in his case, onstage.
The question here is who is onstage? The musicians in the far distance? The people being served drinks who out to play for the evening or the lovely barmaid serving the drinks?
And who is backstage for that matter? The barmaid again or the creator of this image or you, looking at this created image?
Perhaps we are all backstage and onstage as someone was no doubt "backstage" watching me catch all this too?