1. A system, comprising: a) a portable smart device (PSD), which includes (i) a processing system, which includes a processor, (ii) a wireless communication interface, implemented at least partially in hardware, through which the processing system communicates externally, and (iii) computer-accessible tangible storage, including data and software instructions used by the processing system; b) a fan software application (FSA), which is saved in the storage and is executed by the processing system, that (i) manages a user interface (UI) on the PSD, the UI implemented at least in part by hardware, whereby a user can interact with the fan software application, (ii) tracks geolocations of the PSD as it moves, and transmits such geolocations through the wireless communication interface, directed to a first fan network management system (FNMS), wherein the tracking determines (A) whether the PSD is outside an outer boundary, inside the outer boundary, or inside an inner boundary, wherein the outer boundary and the inner boundary are defined within the storage and are specific to a first venue, and (B) whether the PSD has qualified as a first fan device at the first event in the first venue by remaining within the inner boundary for a qualified time interval, wherein the qualifying time interval is defined in the storage; (iii) offers an event networking service (ENS) to a plurality of PSDs that have qualified as attending the first event, in the first venue, which is not offered to a plurality of PSDs that have not so qualified, (iv) receives ENSs through the wireless communication interface from the first FNMS during the first event while in the first venue.