What do you expect out of a car show?

How is this idea:

If you get local fast food eateries to be sponsors, the car show organizers could issue numbered tickets (some car shows actually have entry fees) say for $1 each. The MC could call a random number each half-hour or hour on a P.A. for a free burger or something at the eatery. That way, the eatery could have some free publicity as people usually like to have a bite to eat or a cold drink anyway at a show.