I love it when the oldies come onboard all dressed up purely because they're flying. There should be more of it!
I have an old BOAC timetable from the 1950s with some artwork illustrating the cabin interiors. In one an elderly couple (say 65+) are loftily selecting from their seats refreshments from the steward's cart. The man is wearing Full Evening Wear, black bow tie, the lot. The woman is in her diamonds. Steward, serving tongs poised for the choice, is of course in a white jacket.
When you thing they were probably hammering along through the cloudtops at 225 knots groundspeed (if lucky) with 4 Merlin piston engines just outside the cabin windows shaking everything apart, it seems even more bizarre. Of course, it had come from ocean liners. Storms or not you Dressed For Dinner there.