descriptive paragraph

No

One possibility is the interactions between wait staff and patrons.

I would avoid simply describing the physical layout and furnishings.

here, i'll start one for ya...

An out-of-the-way diner becomes the unlikely battleground for the survival of the human race. When God loses
faith in humankind, he sends his legion of angels to bring on the Apocalypse. Humanity's only hope lies in a group
of strangers trapped in a desert diner with the Archangel Michael.

Oh great! Now he has to write a descriptive paragraph about the Apocalypse.