Considering the Testa Gioacchino in Rome?
A VT member wrote the following comment about visiting Rome:
Tips for Coffee by mariocibelli
When you order a coffee it is normal to leave 5 or 10 cents as a tip with the receipt when you put it down on the counter. 5 or 10 cents is enough, as untiol 3 years ago it was nromal to leave 100 or 200 lire, so it is fine. Don't start big tipping as it only makes people then expect those big fat tips all the time. In Rome it is more a courtesy than an expected sort of thing. In Florence, you almost never see anyone tip for a caffee.