Is there something that still interest him or soemthing he still hasn't done. A friend of mine took her father on a hot air balloon ride for a big birthday present. I think number 90.
Does he still enjoy cooking? What about some cooking classes? He could still be out socializing and learning at the same time.
My granny was still granny on the go but couldn't really tie her shoes anymore because of arthritis in her fingers. I bought her some really nice light weight leather(white leather was what she wanted so she could wash them off) velvro close shoes. She loved them and could go every where in them.