The Collaborative International Dictionary of English v.0.48:

automat \automat\ n.
   1. a vending machine from which you can get food.
      [WordNet 1.5]

   2. a type of cafeteria where food is served from machines.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

automat
    n 1: a vending machine from which you can get food
    2: a cafeteria where food is served from machines

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "automat":
   beanery, bistro, buffet, buvette, cafe, cafeteria, canteen,
   cantina, chophouse, chuck wagon, coffee shop, coffeehouse,
   coffeeroom, coin machine, coin-operated machine, cookhouse,
   cookshack, cookshop, diner, dining hall, dining room, dog wagon,
   drive-in, drive-in restaurant, eatery, eating house,
   fast-food chain, grill, grillroom, hamburger stand, hash house,
   hashery, hot-dog stand, kitchen, lunch counter, lunch wagon,
   luncheonette, lunchroom, mess hall, pizzeria, quick-lunch counter,
   restaurant, slot machine, smorgasbord, snack bar, tavern, tearoom,
   trattoria, vending machine, vendor