What do Raleigh, Denver, Houston, Seattle and Minneapolis have in common? Not weather. Not cultural attitudes. Surprisingly, they share a love of free Wi-Fi – they’re the best cities in America for free WiFi hotspots. In the past years, as connectivity has become more important and the number of WiFi-ready mobile devices has exploded, a number of U.S. cities have scrambled to give their citizens access to free public Wi-Fi networks, although they’ve come with mixed results.