Greek people don't stay much at home. Every tourist will easily notice that, and that is the general rule in deciding where to go. Athens boasts excellent restaurants with top quality food and atmosphere.
The best cafes are usually the most crowded cafes, the best restaurants the ones with the tables already reserved. You can try as many kinds of food as you like: top of the list is of course the traditional Greek food, Fusion Greek, Italian, Japanese, French, Lebanese...Enjoy your food or as we say in Greece ' Kali oreksi'!