There are two big markets a week in Nantes, and they are both very busy. French do love food after all.
Fruits and vegetables are not always cheaper than at the supermarket but people have their “petites habitudes” (shopping traditions) and they enjoy stopping by the same stalls week after week. They joke with sellers, taste fruits, complain about prices and happily bag a few pounds of this and that. So-and-so has the best meat, so-and-so has the freshest bread, etc.
Markets also reflect the diversity of France. While it is not as multicultural than in Canada, you can now find a lot of foods and products from Northern Africa, Asian food as well as exotic spices.