#canteen.store  sells food and personal items to personnel at an institution or school or camp etc.
  supertype:  store__shop  a mercantile establishment for the retail sale of goods or services; "he bought it at a shop on Cape Cod"
  subtype:  commissary  a retail store that sells equipment and provisions to military personnel
     subtype:  post_exchange  a commissary on a United States Army post
     subtype:  slop_chest  commissary maintained aboard merchant ships to sell merchandise to the crew
     subtype:  small_stores  personal items sold aboard ship or at a naval base

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