I too observe hat etiquette, removing it indoors and such. I know there is a strong cultural attachment to wearing big Stetsons and trucker caps in restaurants, and I see the problem of where to put them if they are removed, and of forgetting them. But I think a man who wears any hat (other than some religious head gear) while eating at a white table cloth place is mistaken, at least anywhere in the Western Hemisphere. Hat etiquette is a lost art. I'll juggle my hat on my lap if I have to, to avoid violating the code. Since Vietnam veterans have been forever left out of the Presidential succession (and don't think I forgive that) I feel I have license to laugh at all the Presidents who salute the troops while being themselves uncovered, which is or was, against military protocol, the price of Presidents who have no real military experience, regardless of their being "commander in chief." Bah humbug. Curmudgeon attack.