In business since 1887, Diporto – a defiantly traditional spot in downtown Athens – has no sign and no menu. The staff doesn’t speak a word of English, and you might have to share a table with eccentric old men who look like they stepped out of a folk ballad. You will probably have to mime your order or draw it on the paper tablecloth. But if you ever wondered what it would be like to eat in a working-class Greek taverna circa 1950, read on.