Customers come to expect of free WiFi once they are at a business. This is especially true for businesses such as coffee shops, restaurants, event venues, etc. Businesses can give out free WiFi by hooking up any off-the-shelf WiFi APs. But that doesn't bring in any advantage to the business. How can he know who is using it, how many are using it, etc. Business in general surely interested in hearing feedback from their customers and letting them know if there is any promo.
Think Wavespot as a layer on top of free WiFi that provides frictionless experience to the customers and hugely valuable data rich information to businesses about their customers.