I lived in Nice for seven months after I finished my undergrad, and will tell you the south is no beer heaven. You will find plenty of places that serve duvel, but that is about it. However, I highly recommend you drink as much armagnac as you can - that stuff is delicious!
However, there are plenty of Belgian beer bars in Paris if you look hard enough. France's beer capital is certainly French Flanders, the area around Lille, near Belgium - pretty much the opposite of the Cote d'Azur. No worries, though, every region in France makes and consumes excellent wine.