There were only two bars/cafes I stopped in last year that did not have WiFi (pronounced "wee-fee" in Europe). Some signals are wide open and do not need a password, others are password protected. Some bartenders post the password prominently somewhere behind the bar, others demand to input the password themselves into your phone (they want it kept a secret). Regardless, you will have two or three opportunities a day to check messages and upload photos to Facebook.
However, please note that Europeans believe conversations on FaceTime and Skype should not bother others. Notice how most Europeans take their phones to a corner of the bar and almost whisper into their phones. If someone is talking loudly in a public space, it's usually an American ("then the doctor lanced the boil on his back and green puss was everywhere! You could not believe the smell! I almost passed out! It was horrible! Hold on Mark, I've got a couple of people at the next table staring at me. They look really angry. Oh, they are saying that they would like to eat their food in peace. Typical stuck up French people. Let me walk outside. Anyway, as I was saying . . . ")