Prosopa
The atmosphere is ebullient and the service is very friendly here—expect to be treated "on the house" with a plate of appetizers upon arrival, as well as with dessert and liqueur before you leave. The menu includes fresh fish, feel-good risottos, and seasonal greens in creative renditions. Food and wine are of exceptional quality, and music is played at the right level. It's conveniently near the Benaki Museum.