@u Your goal can't be "make this party quieter right now" until you have some sort of working relationship with the party-thrower: as you say, they're drunk, so you need to have already established what the protocl between y'all is when both parties can properly consent - i.e. both are sober.
So that means making a request that future parties be quieter, sometime when there isn't a party.
Now, you can just do this directly - go over there the day after the day after the party, 1/n