I am something of a connoisseur of hamburgers. I can likely remember the ten best hamburgers I have ever had, and all of them have been in Europe. My experience has been that any hamburger in any small restaurant in Germany or Poland beats basically anything you can find in the US, anywhere. Here we are eating a hamburger at a small sort-of-hippyish restaurant in Gdańsk: not one of the ten best I have ever had, but OK. Note, there is always beer served in European restaurants.