First off, I don't believe you can MAKE anyone be interested in your products and services until you first invest a little time and show that you're interested in THEM.

If you have existing customers using your POS, then start there - get 20-30 (or more) testimonials about your POS. "Ever since we switched to Company X's POS, we've had terrific and measurable results. The system is so simple to use that it saves us a massive amount of training time - anyone can use it. The reporting features are amazing, allowing us to simply and quick view and compare our transactions so that we can... [insert your favourite eye opening comparisons & benefit statements here]. Bottom line, it's simple to use, user friendly, happier staff and greater profits.

Go get those testimonials, package them together with contact names, business name, and contact numbers and then approach your market... "We work with restaurant and cafe owners want a better way to track revenues, get more time, and more profit so that they can focus on what they do best - create amazing meals and wow their clients... Let me introduce you to 30 or your industry colleagues and show you how we did just that...

90% on consumers trust consumer endorsements more than any other media out there... so leverage it.

PS: I don't charge extra for typo's, they're just my gift to you ;-)