Very nice work. I think the black edges (at the top and at the bottom) somehow "break" the perspective a bit,
but otherwise it's a good job.
I really love the oppressing mood you've set (it's quite different from the cosy mood of the picture), with
the red walls / wine and the dark cityscape behind the glass.
The guy's left arm seems a bit twisted around the elbow though. I love the grainy paper you drawn on, it gives a
lot more "life" to the colors, and somehow texture like you could touch it !
Thumbs up :D