Seriously, what the fuck? Maybe it's too long?
Is this your house or someone else's? If it's yours, you should be kicking those assholes out without a second thought. It it's not yours, you should leave and go find people who listen to good music.
Big parties are never at my house, but if its just like 7 or 8 of us hanging at my house I put the mats on. They call it depressing so I usually Put on the Smiths, Elliot Smith or Mineral after to fuck with them.