Although one can find different ethnic foods in Athens, the great majority of restaurants in Greece serve only one variety of food: Greek food! To most people who consider "variety" to come from different types of cuisines this might sound rather monotonous, but Greek food comes in many shapes, forms, and varieties to keep even the most demanding traveler satisfied.
Restaurants in Greece come in many different sizes and varieties as well. There are the "touristy" restaurants that would normally serve what travelers most often desire, and there are restaurants that cater exclusively to tourists . If you visit Greece as part of a tour group, chances are that you will mostly frequent such establishments. The food quality and service in both cases is exceptional, and the restaurants themselves are very clean. You normally find them in or around the most touristy spots of Greece (like Olympia) and the tour busses automatically unload their passengers at such restaurants before or after a visit to a major archaeological site. The prices vary but as a rule they are high, although they are often included in the tour price for a substantial discount.
There are also restaurants that cater mostly to tourists away from archaeological sites. They are located in the busiest parts of town, such as the waterfront of most coastal towns and islands. They also exhibit exceptional service, delicious food, and moderate to high prices. In fact, the closer you get to the waterfront, the higher the prices seem to climb. But there is no price too high to pay for a late dinner right next to the slithering reflections of the moon over the gentle waves.
A little further wandering around the narrow streets of most cities will reveal the places that the locals frequent. Although there is no written rule that establishes such restaurants as better than others, a little exploration might reward the visitor with a restaurant that offers great Greek food at great prices, and in an authentic local atmosphere. An option worth checking out if you are budget conscious, or if you plan to stay in one place for a long time.
Restaurants are most often referred to as "Tavernas" of "Fish Tavernas" (Psarotaverna) if the main focus on the menu is seafood.