The 2018 closing of downtown’s Brasserie Jo sent fans of that classic brasserie looking for new options, and many will be happy to rediscover Petit Robert. The cozy bistro, open since 2005, offers a casual, classic French experience. Starters include escargots and onion soup with a gooey melted cheese crust, and mains include lemon asparagus risotto, steak frites, and the much lauded Coquille Saint Jacques—scallops with braised leeks, saffron sauce, and puff pastry. Weekend brunch offerings run from omelets and quiche to classic moules frites. About 20 wines are offered by the glass. Paris-style, tables are close together; a small front patio buzzes in warm weather. With Symphony Hall a short walk away, it’s a good option before or after a Boston Symphony or Pops concert. Petit Robert’s sister restaurant, Frenchie Wine Bistro, is at 560 Tremont St.