Probably one of the worst jobs ever, and one of the lowest paid. If you don't know the Delivery area by heart, or have a GPS in your car, you'll constantly get lost. Especially at night. Customers get pissed if you're late, sometimes people don't answer the door, and you'll never get good tips. It's a job you won't make any profit from. Most Pizza Delivery drivers have to use their own cars, and pay for their own gas. So whatever tips you do get, you'll end up spending them on gas. Washing dishes is another responsibility for drivers too, while they are waiting for their next delivery. Avoid this type of work for the sake of your own sanity.
Mark the Pizza Delivery driver makes 6 bucks an hour, and got lost on his way to some house in the middle of nowhere. But when he found it an hour later the people didn't even answer the door.