This is true - I can't imagine going to City games and not having a drink at all. Sure, maybe a midweek game if I'm rushing home from work and getting to the ground late on but weekend games? Not a chance! As you say, it's as much about meeting up with mates, etc, as it is about the football.
That said, I do just need to pace myself more. There used to be a time where I might typically have 4,5, or 6 pints before a weekend home or away game but last season there were games where I was literally chucking a dozen pints down and hardly remembering much about the match itself. I was that wankered against Bayern at home that I thought Mahrez scored our opener rather than Rodri! And when the half time whistle went I thought that it was full time and I applauded the players off for what I thought was a hard fought 1-0 win, only to then be told otherwise! That's not good and I need to reign it in, not just for my own health and well-being but also because a great display pretty much passed me by.