Great photo. You could even have used a slightly longer exposure time, showing the other people in more motion focus. It would have made the Sax Man stand out even more. 7
The sharpness of the figure and the softness of other elements at the same distance gives this a strange non-photographic feeling: almost suggesting that you weren't confident of the composition alone to make your point. With thos background figures I can understand why. Tonality is good, although for me I would perhaps have preferred a slightly stronger contrast.