Leaving food on your plate is impolite. Do not ask for a tour of your host's home, it would be considered impolite. Send a thank-you note or telephone the next day to thank hostess. The French are the world leaders in fashion. Dress is conservative and understated.
Casual attire is inappropriate in cities.
Be clean and well-dressed at all times. Suit coats stay on in offices and restaurants. Gifts Small business gifts may be exchanged, but usually not at the first meeting. Give a good quality gift or none at all. When invited to someone's home, always bring a small gift for the hostess.