Vegas has an eiffel tower too...
Diners are something else. In Germany we have "American diners" where you pay for each cup of coffee.
It's not the same.
Like, no. I want my American-style hash browns, over-easy eggs, and country-fried steak, not the same burger every pub on the street is doing.
And (refillable) filter coffee please, not just espresso drinks.
We had a place like that in Berlin about ten tears ago. Free coffee refills, free tap water on every table. That place sadly did not survive.
Like, maybe they're passing each other somewhere over the Atlantic, and giving each other a friendly nod as they go along their respective journeys.
I thought that the "Elvis Diner" was practically a meme in the UK, actually. Hah.
What do they serve?
Within the US, there are at least two major diner chains:
At a diner in America, I'd be unsurprised to see some less "diner" offerings. When I go to my local non-chain diner, I order fettucine alfredo. And the article here has a good picture of a diner advertising "American and Korean food". I think part of the core diner concept is a somewhat athematic menu that is meant to cater to local tastes.
With that in mind, Cheesecake Factory might also be thought of as a diner. https://www.thecheesecakefactory.com/menu
So I'm a little surprised at the idea of a diner that only has classic burgers / shakes / pancakes, but I'd have to admit those are fairly core dishes.