Part of my nature misses the courtesy of playing baseball at the same place the football happens. Vice versa. Whatever. But who can argue with the beauty and amount of seats clashing heads. And I think at least now, surely the footballs can be in the same facilities! Thanks Seattle.
More fodder: wikipedia.org/wiki/Multi-purpose_stadium
Concerts, ...large gatherings (duh). As told in the article above, ...bowling and hockey. Snowpening day is a good one. A dilemma of vacancy stretches from off-seasons to even minor league teams vacating.
While looking below at Soccer cheerleaders, what do you think some cool, perhaps irregular, uses for stadiums are?
See much more talk for expansion, co-location and relocation for big league football, baseball, basketball, hockey and soccer on my blog