I feel like the U.S. was the only country where 2-door "sedans" were popular and offered in almost every model. Kind of a weird phenomenon if you think about it.
These were popular in europe aswell, thinking of the Volvo Amazon, Ford Cortina, Daimler Double-Six, Borgward Isabella, Opel Commodore and many many more. Japan had the same thing in the 90's with the Silvia, Chaser, Skyline and so on.