The future of parking is no parking. Or at least a lot less parking. A growing cadre of developers in Denver and beyond aren’t passively waiting for the day autonomous vehicles overtake their human-driven predecessors. They’re planning today for a future with less demand for car parking, building garages in a way that, some day down the road, they can be can be converted into residences, offices, retail or other uses. At Denizen, an apartment complex that opened last year 20 feet from Alameda Station’s light-rail platform, the future is retail — about 30 of the complex’s 275 parking stalls can be converted into street-level storefronts. The proposed World Trade Center Denver campus, near the 38th & Blake Station in River North, plans to go even further.