Squeeze in around the zinc bar and feast on amazing tapas (fried squids, egg and mushrooms, and veal breast with green cabbage) and wines by the glass in a chaotically sociable atmosphere. There are only a few seats around the bar and it's tiny.
For seafood tapas, head to adjacent L'Avant Comptoir de la Mer; for porcine tapas, nearby L'Avant Comptoir du Marché. Or for gourmet bistro dining, try for a lunchtime table or evening reservation at Le Comptoir.