I know what you mean. I hate such parties (plus I don't drink alcohol, so I live in a 24/7 nightmare). Here, in one of the northern provinces (Córdoba) we have the second biggest Oktoberfest of the world (the first must be München's
). I think my situation is the opposite as yours. There, the people try to appropriate a tradition that, even if it's not national, it tries to be. In my case, people suppress the own identity because "if it's foreign and there's alcohol, it has to be ours too". I like that my country is open to other countries' traditions (also understandable because the country was built on the premise of immigration from all countries before WW1), but I absolutely hate when they neglect their own. Argentina likes partying, so at some point, all the celebrations that are ours but don't include getting wasted are replaced by fancy foreign celebrations that don't mean anything to us, an the others are just for the poor, old, conservative, boring people.
To me it's sad that the only time the sense of community appears is when scoring goals in a football (soccer, whatever) match