The cable car at Santorini in Greece does DCC. (And doesn't accept Amex.)
On the positive side, at least the fee is clearly stated and isn't nearly as bad as some. The DCC fee of 24c on $6.80 comes to 3.53%.
I HAVE CHOSEN TO PAY IN USD & UNDERSTAND MY CHOICE OF CURRENCY IS FINAL. THE EXCHANGE RATE IS BASED ON EUROBANK WHOLESALERATE AS OF 28/11 PLUS AN INTERNATIONAL CONVERSION FEE OF 0.24 USD. THIS SERVICE IS PROVIDED BY EUROBANK
Having refused to sign, the agent "reversed" the transaction by crediting 6 EUR (not DCC), thus meaning I was charged the DCC fee for nothing. I'll have to dispute it.