My friend Richard took me to Les Marronniers first, for a quick lunch across from BHV in the 4th. It's a casual sort of cafe, excellent salads and small sandwiches. I went back with Ken because we were jonesing for the promising looking American-style hamburger, which was OK but a bit of a disappointment. Should have had the Sunday brunch like everyone else!
I believe in the afternoon / early evening this doubles as a place for a quick glass of wine for the young gay men that suddenly appear all over the Marais. Tres gentile.