DEAR MISS MANNERS: This is a fairly simple question, but rather important to me. I am always careful to remove a cap or hat when indoors, but the camp I work at has recently switched to dining in a tent. Does the tent count as indoors, and must I remove my hat?
GENTLE READER: Certainly; one does not wear a pith helmet with black tie.
Oops. Miss Manners has seen too many old British jungle movies. But the principle of observing the decencies is still good. A dining tent is considered indoors, or in-flaps, even if there aren't any.