Possible Clues:

• Half-hearted meal served here?
• Eatery traditionally modeled after a rail car
• Rail car to eat in
• One taking a meal
• Widespread Panic song about a place to eat?
• Oblong eatery
• Truck stop
• About one, tear over to a greasy spoon
• 'Can I get ya more coffee, hon?' joint
• (Person eating in) restaurant