The Mauzac name comes from a Southern-France grape variety, the Mauzac, which is used to make lightly-sweet white sparklings, the most well-known being the Blanquette de Limoux, a sparkling which was already famous more than a century before Champagne was invented. Much more cultivated several hundreds years ago, it is now a minor grape variety mainly grown in the Gaillac region. You can spot the Gaillac region on the map showed on the lower part of this page (the red patch on the right).
Boris and Chloé, the managers, run the place since a year or so, and they keep the natural-wine philosophy of the wine bar. Every single wine here is vinified with the most traditional, non-interventionist manner. You may leave Boris choose your wine, he may well suggest a.....Mauzac, as they have precisely the white sparkling Mauzac here, and this one is made by Robert Plageoles, the most renowned vintner of the Gaillac region in the South-West of France. If you look for sparkling gems other than Champagne (and there are many in France), this is a good way to begin.
The decor is not as important as the quality of the wine list, but many details at Le Mauzac are visual reminders of how much wine is important here : There's a great collection of carafes and decanters on the side, the wall under the ceiling is lined with empty bottles, there's this intriguing painting, and of course, the semi-circular zinc countertop with grapes all along the side, molded in the thick-graining, patined metal.