This is partly why the indoor shopping mall became such a sensation in the 1980s and 1990s. Suddenly, one centralized location offered shoppers access to a multitude of different stores.

But by the turn of the millennium the Congress for the New Urbanism was worrying aloud about “greyfields”—shuttered indoor malls that fell to an oversaturated market. In 2000, DeadMalls.com ...

Players compete in pickleball at Pickleball America indoor courts at Stamford Town Center. Photo courtesy of Pickleball ...