Maitres George is more of a "cave" for alcohol and other beverages. They not only sell beer, but wines, spirits, liquors, glass ware and even fruit juices and packaged water. Upon entrance, the place feels like a warehouse with crates of beer all over the place. Once inside, they have a very elegant "cave" at a corner for the beers. Good selection of mostly Belgian and local French beers. The others are mostly German and guests like Brewdog, Mikkeller and a few English ales. The prices are reasonable.
P.S : Did not come across 700 bottles, a widely exaggerated figure. Would say roughly 250.