I think Denver (I live here) is an example of our horrible zoning. We have entirely focused our cities (especially Denver and RTD (Regional Transportation District)) around people commuting in for work. This is one of the main principles of BAD design, where you create an entire area around close to a single use (offices). That creates a very fragile city. This "single use" zoning that the US proliferated makes us re…
I also live in Denver. The biggest problem with downtown isn't zoning (though that may be a part), it's the homeless people. Who's going to want to go hang out on 16th when there's a dude asking you for money on every street corner? I don't know what the solution is, but it seems clear to me that revitalizing downtown starts with removing the "I'm going to have to deal with vagrants" factor.
Of course this utopia would attract folks from other areas, so can’t be solved only locally. Needs national support.