There's a wonderful tea-room in the Jaquemart-Andre Museum on Blvd. Haussmann. Wonderful old "hotel" with great gallery and tea-room. I can't remember if the tearoom opens onto the garden or not, but the building is off-street and classic. It's not a huge great museum, but a large noble home of the late1800s-early 1900s. The gallery itself is fabulous and the way the gallery and the home are intergtaed is superb.