The word bouillon refers to the workers’ restaurants, found all over Paris back in the 19th century. The idea was to offer good food at modest prices, a concept that still speaks to working Parisians more than 100 years later, if the line out the door of this 300-seat joint is any indication. You come here to tuck into classics like leeks in vinaigrette, boeuf bourguignon, and chocolate eclairs at prices so low (think 3€ for a starter, 8.50€ for a main, and less than 3.50€ for dessert) that you wonder how the place makes a profit. The menu covers a wide variety of traditional dishes like steak with fries or rum baba. Service is fast and furious, but it’s all part of the atmosphere, which is something that belongs to another time and place. You cannot make a reservation, so be prepared to wait.