Yes, I always speak Greek when initiating transactions in shops and tavernas.
I say: Kalimera (Good Morning) or Kalispera (Good Afternoon/Evening) before lapsing into my native tongue and hoping that mine host has made the effort to learn a foreign language, an enterprise in which I have so dismally and obviously failed.
I am full of admiration for the people I've met who can get by in a number of tongues.
We once met a young lad called Gerasimos in Kefalonia who seemed to be able to converse easily with whoever he met, English, Germans, Italians, Dutch, Spaniards...
Mind you, he did have the advantage of living and working in his Dad's taverna and thereby having the incentive and opportunity to take the plunge.
What is the saying? Necessity is the mother of invention. I would credit the author of this quote but no-one seems to know for sure.
I'd love to learn more Greek.
We've got various books and we've even been to night school classes but have found it so difficult.
I think that the only way I'm going to be able to do this is to go and live in Greece.
Now there is an idea...