While WiFi was initially designed as a local-area access net- work, mesh networking technologies have led to increas- ingly expansive deployments of WiFi networks. In urban en- vironments, the WiFi mesh frequently supplements a num- ber of existing access technologies, including wired broad- band networks, 3G cellular, and commercial WiFi hotspots. It is an open question what role city-wide WiFi deployments play in the increasingly diverse access network spectrum. In this paper, we study the usage of the Google WiFi network deployed in Mountain View, California. We find that us- age naturally falls into three classes, based almost entirely on client device type. Moreover, each of these classes of use has significant geographic locality, following the distri- bution of residential, commercial, and transportation areas of the city. Finally, we find a diverse set of mobility pat- terns that map well to the archetypal use cases for traditional access technologies.