I think of orienteering as a sport for old golfers.
Good point...if you mean 'old' by anyone over 35. Here in the US, O seems to be most popular with older folks...but not necessarily golfers.
I'm most grateful for seeing a small listing in the paper in 1991 when I'd just turned 50, and went to a local meet. The guys I met there were all within 10 years of my age, and I was immediately welcomed warmly and showed the basics. At the time, running, biking, swimming in Lake Michigan were my favorite sports.
But I don't think I'd have felt that interested or welcomed if I was in my 20's, and saw no one even close to my age. And I would have wondered what all those controls were for, which prevented me from maintaining my 7-min/mile pace!
I see O on a continuum requiring less and less fitness, balance and endurance: Running, Orienteering, Golf, Porch Rocker.