Depending on the laws where you're at, you probably *can* call the cops. Look up the rules regarding when you can and can't make sound above various decibel levels -- or just call asking for the rules about how late people can be extremely loud. If they're over that amount and have been for half an hour or something, the cops will show up. (Even better, you can bypass the noise rules by just saying that there's some couple having a huge fight out in the street, and the cops will show up anyway.)