Creative Reuse for Dead and Abandoned Stadiums

It's a bit early to consider turn off the lights and mothball Busch Stadium for the off-season, but win or lose, baseball heaven will soon be quiet. And with it, the surrounding streets, parking garages and Ballpark non-Village. What, if anything can be done to bring activity to a very seasonal attraction? Personally, I'd like to see a stadium built with street-facing retail to keep the scene less than dead during the down time.

Football stadiums inflict many more dead days than smaller and busier baseball, hockey and basketball venues (the later two frequently and easily accommodating a wide range of uses). Even those attached to convention centers often find conflict with the NFL and major convention calendars. Then there's the re-use of stadiums. Major concert tours, monster truck shows, outdoor hockey and more have taken place. What else could be tried? What would be a good fit in St. Louis?