Catering clients can opt to use their own own outside av services for instance a major convention client may have a long-term national contract with greyhound exposition creative services division and soon a large national firm that provides a wide array of meetings and conventions services. In this case,a client will save money because of the quantity discounts available with nayional contracts. A n added benefit is that over time, the national firm will learn and understand the group's unique needs and personalities and tailor its services accordingly.