Place Jourdan is my favorite square! Its 'historical monument' is the Friterie Antoine. You can become part of it standing in front for 20 minutes (doesn't matter the weather) to finally get your portion of fries with whatever sauce! Once you get it, you can choose your bar, enjoy your fries and…
choice of different world kitchens from Argentinian via Italian and Greek to French and typical Belgian cuisine. Chez Antoine is known for the best fries in the world and all bars around it accept that you bring your frites/fries/snack and buy the dring/beer from them.
square with several bars and restaurant and a nice park with lake just close by
Good collection of bars and restaurants. Catches the setting sun well. Best visited in the early evening.