Kitsch

 Here we see obviously the comic book Kitsch style, with the 50s styled dress. It's bright, it's dramatic, and the only thing it's missing is the iconic dots that propagated comic books back in the time.

https://www.etsy.com/uk/listing/456149354/comic-book-dress-pin-up-dress-retro

Here is an old styled diner but in modern times. They have a lot of the iconic things you might see in a 50s diner, with checkered patterns, traditional food, and even the classic cars, but the outside décor and the windows show that no, it's still set in the modern world.

https://www.newretrodining.com/index.html

Here is an example from Fallout 4, one of the posters found in the game. It's in traditional kitsch style, with the exaggerated faces that are even somewhat 'floating,' but you also have the idea of the space right and the fear of communism.

https://fallout.fandom.com/wiki/Fallout_4_posters?file=Communists_From_Space_poster.png