We were forbidden by law to do door hangars and go door to door. I found that this was a great place to hire from and the demographics were great. I would push Principia Pizza Party Packs, and have my phone number in every dorm room. Desk calendars are great with perimeter coupons. Refrigerator magnets and mouse pads would work too.
Pizza is an impulse food, more impulses more sales.
Faculty love to have pizza parties for the students. That's the perfect time to personally hand out the freebies and press the meat, face to face. People like to do business with people they know and like. This a very complex area. It involves a lot of answers to a lot of questions.