I stayed at the Canopy in Cancun and checked out on Monday morning. I had made the reservation in USD - and I confirmed even booking from the Mexican site would result in USD pricing as well - so I was curious how the hotel would handle this. I use an Amex for Hilton stays, so there is no danger of DCC. The reception took a preauth of 1,000 USD. Prices at the hotel restaurant and bar were denominated in MXN. Upon checkout, I was presented a bill with all charges presented in MXN, but the credit card slip was in USD. The curious thing was that the exchange rate was 22 MXN = 1 USD, which is more favorable that the current rate by 4-5%. I confirmed that the room charge & taxes matched the price at the time of booking in USD at a 22-to-1 exchange rate. I wonder who set that rate, and, if one presented a MXN denominated card would the preauth and final charge be in pesos? I did see a label on the terminal that said USD/MXN.

While this isn't quite an example of DCC, it is a currency conversion process that I hadn't seen before. The closest recent example I could remember is Aruba, but even that isn't an exact analog. The hotels there denominate everything, including the bill, in USD, so I imagine one would never see the AWG price unless paying in AWG.