First, I would have to re-echo Empath's remarks about the usage of the term "old man". My father, who has been dead for ten years now, would have found that term to have been incredibly, and gratuitously, offensive.
Second, and to answer your question - I happened to be in Washington, DC. I walked into the bar at the Army - Navy Club, and bought a round for the bar, in his honor. I went to the O-Club at Bolling AFB (I'm retired AF), and did the same. Then, I went to the O-Club at Ft. Myer (my father was a retired Army officer), and did the same. Finally, I left the Club at Ft. Myer, and went to Arlington National Cemetary, visted his grave, wished my father a happy Father's Day, and told him how much I missed him.