I live a mile away from ASU, and there are always at least a dozen scooters within a few blocks of my door. In principle, I love them, as they promise to ease up on the problems (environmental and otherwise) associated with people driving huge cars alone for short trips. Unfortunately, people are not abiding by their rules, at least the ones I read last time I rented a Bird scooter.
To get an idea of the volume in Tempe, here's a map of available Bird scooters in an area that's about 2 x 1 1/2 miles. Lime and Razor are also renting scooters in Tempe.