At only 100 ASA/ISO?
Well done. WOW. For how long did he have to look? There usually aren't oodles of light in these halls! And all the light you used was the given light, wasn't it? So taken with 100 ASA film, you must have exposed for quite some time!
He looks lonely. Not only because he seems to be alone in that hall, but also in his face, as if nothing much were going on in his life besides his gambling. Maybe...