So traveling in the US, I have been used to being able to pay with CC in restaurants , unless they specifically have "NO CREDIT CARDS ACCEPTED" notice. For my first real trip to Europe, I brought some euros but wanted to use CC as much as possible. We found a small (less than 10 tables) restaurant in Paris that had clear, newer, and undamaged VISA/MC logo stickers on the front door. After having the meal , I tried paying with VISA but the waiter/host simply told me they don't have wifi and don't have machine. Had this happened in the US, I would have had a fit . But it was another country and the meal was good , I just paid with cash and didn't leave the tip I had planned.

So I guess, what would be acceptable to do in such a situation where a dining establishment clearly advertises credit card logos but only tells you after dining that its not true? For a retail store, you could just put the merchandise back, but not so with a restaurant ...