Holding up the queue, eh?

I use € coins for tips or cereal bar purchases. In my country you'd get odd looks if you did that, because we have a bill that's roughly equivalent to 1€. But in Germany or Austria you'll get smiles and herzlichen grüßen because sparing-inclined citizens of the aforementioned countries only tip small change like 10 or 20 cents. Doing it often enough at a Greek tavern gets you freebies.