Time Out says
Open 22 hours out of every 24, Café Mabillon is a lounge bar in the heart of Saint-Germain that's generally populated by well-heeled locals. In the daytime, the large terrace attracts passers-by in search of a rest stop in the sun. A glass of Chablis in hand, sunglasses in place whatever the weather, one is here to see and be seen. When happy hour commences, the golden youth take over the leather banquettes to sip cocktails. For those wanting a light snack, you can get a croque-monsieur or a salade de chèvre chaud or cheeseburger at any time, even if for rather overinflated prices. It is one of the few places still open at 4am in the morning so it’s an excellent refuge for a place to fill up after a big night out.
164 boulevard Saint-Germain
|Transport:||Métro : Saint-Germain-des-Prés|
|Opening hours:||Daily 8am-6pm|