At my prep school, it was sport coats and ties. Of course they didn’t expect me to wear red plaid pants with a green madras sport coat, purple shirt and electric blue tie, and yellow socks!
ah, yes we wore madras shorts, very cool 61-64
Catholic boys schools. Shirts with collars, no jeans, no tennis shoes except in PE. Hair off the collar. and strictly enforced
We just got off a cruise and even though the Dining Rooms don't allow SHORTS and COLLARLESS shirts at dinner, MANY, MANY Sloppy men came in like that, and the Doorkeeper said NOTHING to them!! I said plenty to her and her boss though. Brings down the whole atmosphere when some pig is dressed like the pig he is.