This fellow is physically in great shape, strong and healthy, been an athlete all his life, approaching 80 years of age, and was employed in a very competitive job until this past March. How can I keep him occupied all day long as he sits and stares out the window???
I know that at one time, my dad, who is in his 70's and active, went to Silver Sneakers. He enjoyed it and it was a way to keep active and socialize with others his age. You could go with him and join in or wait for him.
Is there a reason that he can't play sports? Bowling, golf, basketball all come to mind.