I was in a club around half a year ago. Mike Tyson walked right past me (actually wearing a shirt that looks a lot like he is wearing in that pic!) on the way to the toilet. People were all pretty chilled, and no-one gave him a hard time or too much bother.
He looks smaller than I thought he would, but also what suprised was that he did not seem to have any bodyguards around. (At other times, when I have been in a club or restaurant, and seen someone like Tom Cruise, or famous pop-stars, they always seen to have 3 or 4 bodyguards).
For someone like Mike it must be a constant risk that some idiot wants to come up and pick a fight so that they get for the rest of their life to tell the story of how they got into a fight with Mike Tyson....