I had the hummus at the counter service in Morocco, which, for my tastes, has some of the best counter food. I have also bought hummus during the food and wine festival,.....huge ice cream size scoop for $1.00.
At the counter service it's 1.99 for a humungo portion (comes with pita chips, but not enough)....but for an extra buck you can get a lovely piece of fresh off the grill, warm, chewy, pita bread. Cheapest meal in the World!