Always change into PJs in the lavatory while still at the gate. Had a 45 min connection at DOH the other week so wore the PJs walking through the terminal for the first time - quite efficient and wasn’t quite as embarrassed as I feared I might be. Champagne may have helped.
Did go topless in a EY Apartment once - door firmly shut of course.
Re PJs - what are people’s views re commando or not?