New l'Opera Restaurant - Palais Garnier
I stopped in for a cocktail last week -- they had an outdoor patio set up as well as the dining room and bar space. The cocktail I tried was one of their signature drinks, "Phantom", and it was quite intense - gin, martini bianco, lemon, and egg white. Plus a little mask-like sugary thing perched on the rim - a strangely cute accent on a very serious-tasting drink!
The decor looked interesting - I'm not a fan of the stark looking tables and chairs (looked a bit like a cafeteria to me) but the glass interior and use of vivid red throughout was stylish. I'd consider going back for dinner, especially since I believe they'll be planning dinner sittings around the theatre schedule, which would be convenient.