Not satisfied with knowing who attended your event? Perhaps you’d like to know where they are during the event itself? Nikaza just launched Context Hub, which connects with indoor beacons, Wifi, and other proximity technologies to follow consumers as they move through a store or other space. They make the location and context available in real time to programmatic mobile advertisers so they can tailor their bids and messages appropriately. Again, no personal identifiers are shared. The company is starting with a network of 400 venues and hopes to eventually add many more.