Walk in (by yourself, even) grab a seat at one of the high tables around the bar area, or at the bar itself, on any weeknight and enjoy it. Or bring some friends on a weekend night, either way Sardine satisfies.
Start with the confit salad. Its lovely and maybe french onion soup? Then move on to the moules frites. Have the appetizer portion - its plenty of food and will let you save room for desert....the molten choc cake is typically good., not what you'd expect in a higher end resto or your corner bistro in Paris for example, but tolerable (hehe). Work your way around the wines by the glass on the chalk board above the bar, or dive into a bottle from the well rounded wine list. No complaints about this place other than not availing myself of its charms frequently enough.