I've been in Ireland this week, which is the origin of this whole mess of DCC. I hadn't seen it on payments until having dinner tonight at Madigan's. I actually noticed it since a customer was paying at the bar with a GBP denominated card. He tapped the payment, and I saw the EU and UK flag appear on the handheld terminal's touchscreen. The customer quickly walked away without selecting, but the bartender selected EUR proactively.

When it came time to pay, the bartender maintained control of the terminal when I tapped the card and pressed the softkey which I knew was the DCC opt out selection. I verified by asking for a copy of the receipt that it was in EUR.

Thanks to the bartender for helping customers opt out of DCC!