article: In the USA, people prefer waiting for a table to sitting with people they don't know. If you're sitting at a table with people you don't know, it's impolite to smoke without first asking if it will disturb them.
  In American restaurants and coffee shops you are usually served cold water before you order. You may find the bread and butter is free, and if you order coffee, you may get a free refill .
  Most cities and towns have no rules about opening and closing times for stores or restaurants, though they usually do make rules for bars. Especially in large cities, stores may be open 24 hours a day.
  Servings in restaurants are often large, too large for many people. If you can't finish your meal but would like to have the food later, ask your waiter or waitress for a--' doggie bag". It may have a picture of a dog on it, but everybody knows you're taking the food for yourself.
  Supper and dinner are both words for the evening meal. Some people have " Sunday dinner". This is an especially big noon meal.
  Tips are not usually added to the check. They are not included in the price of the meal, either. A tip of about 15% is expected and you should leave it on the table when you leave. In some restaurants, a check is brought on a plate and you put your money there. Then the waiter or waitress brings you your change.
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question: What do American people mean by asking for a "doggie bag"?
options: They will leave the food on the table. They will take the food home. They will give the food to a dog. They will share the food with friends.