How about a "Gas Buddy" type app for FREE WiFi spots?
Something like this website free wi-fi Pennsylvania Philadelphia Pittsburgh
Something that you can open and it will search for FREE WiFi spots near you and perhaps map them. It would probably have to be linked to some online website like gas buddy and speedtraps that users would "report" a location, and perhaps stuff like, whether you need to ask for a password or if its totally open. Whether it has a filter that blocks "inappropriate sites like gun sites or porn or whatever. (I know that Panera Bread blocks many gun forums). Whether or not it works from the parking lot.
Ths could be useful if you have ****ty service somewhere, but maybe there is a McDonald's with free wifi around the corner.