Devils Advocate: It's possible that he didn't know there was food. The Indo link I posted earlier about the tickets said you could bring a guest. If someone else bought the tickets and he was a guest just for the golf only, he might not have realised there was dinner afterwards.
Maybe some newspaper will post photos over the weekend. It might have been a formal dinner and they wore tuxedos? Then it would be hard to deny. I wonder if the hotel had security cameras in the ballroom/dinner area?