McDD certainly showed their near-LA base on occasion. An article describing the sales trip of the DC-10 prototype that went through Istanbul and led to the THY order (and thus to the Paris crash) had them taking key Hollywood entertainers along (Sammy Davis Jr seems to ring a bell, although I'm open to correction), to keep the politicos and hangers-on feeling important in a grand floorshow.
If you understood the notably small THY fleet and network of the time, you would wonder just what possessed them to go for such a large type in the first place ...