The extent of my French is pretty much Hello, Good-bye, Please, Thank You, Where is the Bathroom? and I don't speak French; Do you speak English?
(Bonjour, Au Revoir, Sil-vous-plait, Merci, Ou est le salle de bain? and Je ne parle pas le Francais; vous parlez Anglais?)
I don't have experience with France (but I might in 2014 - a friend might be moving there for a year; her husband works for Disney and is involved in the installation of a new ride(s) at Euro Disney) but do have experience with Quebec. I've found, even in the most French areas, that if you greet someone in French, let them know you don't actually speak it and ask if they could speak in English, almost everyone will switch to English, if they can.