Nice shot! Catching the people interacting and involved, in this natural scene, is much more real than those mis-en-scene images that have been so popular. The lighting and exposure are good, especially when considering the inside-outside contrast.
I have done my share of restaurant shots, and if I can locate one that I particularly like I'll post it here.
By the way, the resemblance of the man to old pictures of James Dean is quite high.