I first flew transatlantic in a 747 (it was known as a Jumbo jet back then) in 1975.
The upper deck was a Bar, accessed via spiral staircase.
Back then, most of the passengers, it seemed, smoked. and men wore suits when flying.
The downside was, luggage carousels at most airports, could not handle all those people arriving on one flight.
Only 40 years ago, and crossing the Atlantic was kind of a Big Deal.