Filippou,
19 Xenokratous
19 xenokratous, tel 210 72 16 390. a very long-established taverna whose simplicity disguises some of the best and most authentic food you can get in athens. seating is indoors and outdoors, though it's hard to find a seat in the latter during pleasant weather.
To Kioupi
Dinokratous & Anapiron Polemou 22
On platãa kolonakãou, tel, 210 36 14 033. known among some american expatriates as "the hole in the ground," this is a basement taverna which has been around forever, serving authentic, inexpensive traditional greek fare.