Visiting escorts and paying them in a different currency, can be quite interesting.

Last time in London, I paid a girl in euros, and she was quite happy.
Subsequently she told me she had got a very poor exchange rate

I see the brazillian currency has fallen about 20% in the last while...would be a good place to visit.
I was there a few years ago, and evertime I converted my dollars, I got more local currency. The rate was getting weaker daily.