So the bar patrons drive the value, right? If your fellow students start using the app (and start asking the guy at the door, "Can I pay the cover with XX app?"), then the bar owners will be the easy part. Focus your efforts on driving adoption. If you've already got 2 bars on the hook, then print some point-of-sale "table tents" advertising the app. Negotiate a drink special that people get if and only if they download the app. Do non-scalable stuff like offering to be the guy manning the door at those two bars for free. Ask every single person with a smartphone to download the app and use it to pay the cover. That's how you can drive adoption: one person, one cover, one bar at a time. You've got to change students' habits, at least at those two bars. They need to reach for their phones, not their wallets. Rally all your friends, and do whatever you've got to do to turn those early adopter bars into case studies that you can turn around and "sell" to other bars in town. Don't look for shortcuts. Get to work.