The Tenth Doctor once felt hungry for a bowl of chili of the sort that, according to him, was only found in an American diner before 1962. (TV: Dreamland)
Astrid Peth spent three years working as a waitress at the spaceport diner on the planet Sto. (TV: Voyage of the Damned)
To set his past self and companions on the path to avoiding his death at Lake Silencio, the Eleventh Doctor arranged for them to meet a diner in Utah. (TV: The Impossible Astronaut) When the Twelfth Doctor was in Clara's TARDIS, whose outer plasmic shell had assumed the form of a diner, he noted the similarities to the diner he'd been in with the Ponds. Subsequently Ashildr believed that the TARDIS' chameleon circuit had become stuck, leaving it locked in the likeness of a diner. (TV: Hell Bent)