For corporate travelers, Hummer and Stretch Limousine is a good choice. These cars are spacious and can accommodate a large number of people. The seating arrangement in these cars can be customized as per your requirement. You may get a center table adjusted in between and choose to sit face to face. This will be a good way to carry a conversation. You can keep your files and laptops on the table, and seat comfortably, and concentrate on whatever is being said. If you need a projector, that can also be installed.