Why are Empty Parking Garages so Great for R/C Races?

Why are the downtown multilevel parking garages such good places to hold R/C model vehicle races and other radio controlled hobbyist community events like bashing, crawling, and drifting on weekends and evenings when they are empty? In this episode of the RC Deep Dive podcast we answer the question of what is it about these structures, exactly, that makes them perfect for all of this?