Playce
Str. Papagou 128
A really nice cafe where you can play board games whilst drinking your coffee. Has a very anime feel to it. Very popular.
There are a whole bunch of standard cafes here which cater the hordes of students that study here, and the large numbers of old men who sit around all day drinking ελληνικοÏÏ Greek coffees. But there are a few gems worth trying out if you want something different.