I've been to Wrigley about 15 times, most of them in the bleachers, and I have seen/heard about 4 or 5 drunk belligerent morons that were probably just there to get drunk. I really don't think there are any more people that go to Wrigley to drink than go anywhere else, but since we sell out most games, there's this ridiculous mythos that gets built up to try to explain it apart from just saying the Cubs have a lot of fans. i've been in the bleachers many, many times as well, but my impression is a little different than yours. there are a pretty fair amount of people there (seemingly) just to drink. obviously it's far worse in the bleachers than in other parts of the park, but the point remains. the only other parks i've been to are great american and busch (II and III), so my experience in other stadiums is limited. i definitely find that wrigley seems to have the highest number of party people. although, i do think it's hilarious that a handful of times in the bleachers i've encountered sox fans who are just there to mock the cubs and cubs fans (not cubs/sox games, mind you) while handing money to my team hand-over-fist by buying the ticket, beer and food.