Isn't this how it works in most of Europe? I don't know - I've been there a few times, and for exceptional service have left a Euro or two on advice of a local,

Isn't this how it works in most of Europe? I don't know - I've been there a few times, and for exceptional service have left a Euro or two on advice of a local, but that's it. A way to acknowledge appreciation, not pay for 20% of the actual cost of my meal in a separate transaction.