In the photograph, the late Duke of Windsor is in Nassua, capital of the Bahamas, at what I will guess by his dress is a golf course.
The Duke's chinos, bluchers and a Shetland odd jacket have been tasteful casual dress in the civilized world for three or four generations but as we all know the places where style hangs on are fewer every month. During the two days I spent in and around Reno, Nevada, the normal dress of the inhabitants was a tee shirt and denim, with the few souls in collared shirts outnumbered by the winners of the race to the bottom in their polyester track suits. And that was in the casino.
Now I do recognize that men are unlikely to wear odd jackets when no-one around them is doing so. And the problem is compounded by the probable lack of a place offering them for sale locally.
Fortunately there are a few square blocks in San Francisco where a jacket wearer still fits in. I am glad to be back.