We will be in Paris mid May and planning to do Versailles on a Saturday. We don't want to be tied to a reservation for that evening, depending on how tired we are. Looking for very casual dining suggestion not too far from Rue de Grenelles and Blvd. Raspail in 7th. Perhaps Pizza Chic? Leon de Bruxelles? Doesn't have to be fancy, but want good food. We are staying in an apartment, perhaps a good place to pick up some dinner would work as well. Thanks!