To be clear, it wasn’t the city that adopted the kid.
The Gold Standard of sitcoms in the late 1980s and early-mid 1990s was the Miller-Boyett situational comedy. Not because the sitcoms have an incredible redeeming value in 2019 (but are great for nostalgia), but because there were so many sitcoms under this partnership.
Over on Pop Culture Retrorama, comedy/parody/humor website Funny or Die shows us what happens when Miller-Boyett style sitcoms meet classic rock with a horn section.
That Time Chicago Adopted A Kid…Sitcom Style!