A couple weeks ago, I couldn't help but over hear a couple discussing how much to tip in US dollars. I thought they were then trying to figure out how much to tip in Euros (this conversation went on for about five minutes). But no, they left five American dollar bills on the table.
Can I just put it out there, that if you feel the need to tip in a country where tipping is generally not the norm (or at least that's my understanding, please correct me if I'm wrong!), to at least do it in the local currency? I just had to laugh while drinking way too much Italian wine, while eating a tiramisu ...