Entrance to the Wolverton Hotel

Uploaded for the Vintage Photos Theme Park theme of: SIGNS
I groaned when I saw this theme, because I remembered that I'd had a hard time finding anything for it last time! It didn't get easier, and this was the only sort of uninteresting example I could find. : )
What type of uniform is Ken wearing, I wonder?
From an album given to me by a library patron.

Written on the back:
Canton, Oklahoma May 14, 1946
Taken outside the hotel we stayed in. Jeanie's husband Ken, Jean, Erma & Bill