Why should I not keep WiFi free for guests?

Indeed you should. We are "connected" to the net more than ever using our "smart" devices. However, engaging content on the Internet, games and social media eat up bandwidth of data plans quickly. Mobile wireless connectivity is not equal everywhere. Mobile wireless carriers would love to see your devices offload to WiFi when possible. Guest WiFi is a very effective but most ignored customer touchpoint. Offer free WiFi to guests but in such a way so that you could reach out to them with their permission, engage with them and hopefully bring them back as a repeat customer.