I have been to 2 Harvard- Yale football games in my life.
One in Cambridge... one in New Haven.
My impressions are that there is probably more drinking in the parking lots before this game that at any other game played anywhere in college football. By far, I saw more drunks at these 2 games than any college football games that I have ever been too. And I've been to Morgantown, Miami, Tallahassee, Clemson, South Bend,, Raleigh- Durham, Hartford, Chestnut Hill, Blacksburg, College Park, West Point, Annapolis, University Park, Gillette Stadium, Carrier Dome, Charlottesville, Heinz Field, as well as 6 bowl game venues.
Harvard- Yale attendees take no back seat to anyone to pre game inebriation, in my view. Those here who have been to this game once or twice probably can verify this too.