For many years now when we travel to Paris we stay out of 'town'.
At the Southern end of RER B line you will fine a real town called Sceaux. Sceaux had noting to do with Paris and is a heavenly place to stay when you need some quietness after a day as a tourist or like us on a busy trade show.
Here you will fine the most wonderful park, almost no tourist and really good and affordable French restaurants.