I found this to be a humorous and informative discourse on the above topic. Check out the price differential ($ per oz. of alcohol), it varies from $2 to $11.
$11!
http://ussmariner.blogspot.com/features ... inking.htm
Beer drinking before and during an M's game
Moderator: enderzero
I've only been to one baseball game, and it was because my MS lead forced our team to go last year. Luckily I was with baseball semi-fans who warned me of this. We stopped by the Uwaji before the game, bought some bottles of good sake, and drank them while we walked down to the stadium. It lasted for the full hour I was there, before I made my escape. (Slipped out while everyone was up moving around.) 