Don't say the "W" word?

Has anyone else heard that when dealing with vendors you should never say the service you're inquiring about is for a wedding? Have you done this with vendors and has it impacted the cost of your services? My best friend said she called a florist and just said she needed a bouquet for a portrait - not for her bridal portraits and they did it for $30. She thinks the cost would have been exponentially more had she said it was for something wedding related. What are your experiences?