lilmod
I’m not calling for adult only flights, just quiet work sections on the planes. In the late 70s and early 80s I was commuting NY-Paris every other week while working for a major multinational corp. I regularly flew TWA (OBM) who used Boeing 747s on the route. The upper deck was First Class and for work and/or sleep. They did not show a movie and did not book any chlidren in that area. It was not a published rule, but done by considerate corporate planners. When a company such as the one I worked for booked 6 First Class tickets 26 Sunday Nights of the year on the same flight it’s amazing what the airlines would do to accommodate us.