Politeness is highly valued on Martinique, so brush up on your manners. It's considered polite to greet a room of people when entering , whether it be in a bakery, a hotel or a cafe. In general, always address people with the formal ‘vous’ rather than ‘tu,’ but know that if someone uses the more casual form of address first (which happens more often here than in France) it’s fine to use ‘tu’ in response.