Fraudulent Credit Card charges

My credit card has not been compromised for 2 years now. It is so aggravating when it happens. Last time it happened it was right before our trip to Zihua. We met friends for dinner at a new restaurant in Chicago. Within one hour of our card being swiped, I had the most ridiculous charges. The first charge was for a guitar and the other a Norwegian cruise for over $5,000.00 dollars. Capital One contacted us immediately and we closed the account. I contacted the restaurant the next day and told them what happened. In my opinion they had an unsecured network. I do not believe it was the staff.