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 national contracts. An 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.