Philipp Brinkmann: try the wine tasting!!! It is one of the very few places in Athens where you can drink just one glass of very expensive wines. Without having to buy a whole bottle.
Edward Mavro: Amazing Cafe/Bar/Art Gallery! a mix of run-down and minimal deco, with an open air atrium as the main "stage" surrounded by 2 floors of decrepit rooms as galleries. Jazz, Blues and lounge music. Excel
Vivian Efthimiopoulou: Avyssinias Square is a unique place in Europe. "Inoteka": nice crowd, the wine list is a joke and it's tad expensive. But I like it. Ask for the wifi key.You"ll have it.