I wonder how much inflation hurt their business model?  Obviously you don&#x27;t want people dropping in 100 nickles for a sandwich in 2015, and even quarters are unwieldy.<p>I guess today it would just have magstripe readers on every door and you would swipe your card?  They could even collate all of the transactions in a day or so and charge your card only once.<p>That said, labor is so cheap that it&#x27;s hard to imagine how you could come out ahead with a system like this.  Maintenance costs are probably going to be higher than just hiring a minimum wage disaffected teenager to do the job instead.