Brasserie Flo, located in the city centre is a huge French restaurant whose decor reminds one of the locals in Blvd Haussman in Paris.
You will find a wide-ranging menu here and a satisfactory cellar that combines French and Spanish references.
In the entrance, in the most pure Parisienne style, you can see the oysters (their speciality) exposed. Here you can order perhaps the best Crêpe Suzette in Barcelona.
Brasserie Flo is a member of a big chain of brasseries spread all over France (Paris, Metz, Nimes...), but this one has adopted and adapted some Catalan traditions into the French base. The service is professional but distant.