Dine at these lost-in-time restaurants for less than €10

The key ingredient behind a bouillon’s affordability? High volume, explain brothers Pierre and Guillaume Moussie, owners of Bouillon Pigalle and Republique. Pigalle, with 300 seats, caters to both reservations and walk-ins, while Republique, a 450-seater, thrives on a first-come, first-served…