Or - he is a 76 year old man that doesn't remember everyone he has met.
I am only 58 and just last summer while we were meeting the kids at a restaurant and this man walks up and says "hey how are you doing (my name), how's business?" and went on to talk about how he has been doing etc.
I had no idea who this man was and I remember faces very well.
When Bonzi first came here, we were at the store and this other guy "hey how you doing? good to see you!".... no clue who he was.
We all forget who people are. You can't tell me you haven't.
He is 76 years old, lived his whole life in one of America's largest cities, went to more parties and fundraisers than any 100 other average people - OF COURSE he forgets people who remember him.