Answer:

diners

Answer	Crossword Clue
DINERS	Modest eateries
DINERS	Bistro clientele
DINERS	1950s teen hangouts

DINERS	Some booth occupants
DINERS	Some railroad cars
DINERS	Bistro patrons
DINERS	Greasy spoons, e.g.
DINERS	Pizzeria patrons
DINERS	Railroad eating cars
DINERS	Eateries
DINERS	Restaurant patrons

DINERS	Roadside eateries
DINERS	Roadside restaurants
DINERS	Short-order spots
DINERS	Some recycled railroad cars
DINERS	Hash houses
DINERS	People taking courses?
DINERS	Railroad cars.
DINERS	Places to eat.

DINERS	Banqueters.
DINERS	Roadside sights.
DINERS	Certain railroad cars.
DINERS	Toastmaster's audience.
DINERS	Trenchermen.
DINERS	Eating places.
DINERS	Restaurants.
DINERS	Certain R.R. cars.

DINERS	Those breaking bread.
DINERS	Fast-food places
DINERS	Oblong eateries
DINERS	RR cars
DINERS	Rolling restaurants
DINERS	Greasy spoons
DINERS	Some Amtrak cars
DINERS	Folks working on courses?

DINERS	Cafes
DINERS	Folks in a restaurant
DINERS	Eating spots
DINERS	They might be coupled to sleepers
DINERS	They might be asked "Are you still working on that?"