Well if you ever do see him, my advise is if hes eating dont bother the man. Let him finish his meal. Since hes apparently in Vegas, you will obviously have to catch him in Nevada or hope he comes to a city near you in some promotional sense.
If I was ever to meet him, I would just shake his hand and that would be enough for me. If he wanted to conversate, that be cool but a hand shake would be enough for me.
"Little does Joe knows, no one use the monkey technique more than the mma." - Sifu Nelson Chin