Bistro de Paris is located upstairs from Les Chefs and is very upscale. It does not have a children's menu, I would not expect to see small children there for that reason. If an establishment doesn't offer a menu for children, I take that to mean it is an adult experience, I have four kids and would not take the younger two there.
Op, Citricos is fantastic also and in a beautiful setting. I would choose the one that fits your plans best.