If I was a bar owner anywhere in the city, I would run a shuttle to and from the game to anyone that buys a drink at my establishment. Not a solution to the problem, but it would be cool if you could go to your neighborhood bar, not in the center of town, and have a free ride. Obviously the more bars that did it, the greater effect it would have.

When I lived in Wisconsin, a ton of bars would do this in Milwaukee county for Brewers games, granted Milwaukee has a pretty big drinking culture. My neighborhood bar was in walking distance, so I would just walk there, grab a drink, and get a ride to and from the game.