[S Car Go]

I think the NFL is just uniquely suited to that sort of thing, since they only need fill a stadium 8 times, and it's almost always in the middle of a weekend day. It could expand by 10 teams, 20 teams, and still be able to fill stadiums. Of course, the quality of play would drop substantially, but people still love college football so...

Baseball suffers the most, needing to fill a stadium ten times as often, throughout the week.