Here is a place to rub elbows with the good working men and men of Greece, 24 hours a day. (Women might be a rarity but certainly their company is appreciated.) It is classically used in the wee hours of the morning by those stumbling home from a late night at the 'Bazouki" where they drink a special soup known as "patsas." There's no better preventative for a nasty hangover or even just to snap you out of a drunken blur.
Closest Metro: Monastiraki Station