I have been pondering about this image for a few days now. And the photo itself was taken during the concert almost two weeks ago. I like it, yet I feel I cannot post-process it the way I want. Part of the problem might be that the light on the scene and the night outside of it were giving too much contrast on faces. When I reduced the contrast, image was lacking the depth. Vicious cycle.
The idea behind black and white and texture came from a friend of mine. He wanted us to capture an image like that, which he could use to sketch. He is doing pencil-drawings.