What a douchebag. Tell him and his lowlife friends that they had better find another place to host their pity party, and failure to do so will result in the authorities being notified.
Srs. Tell him the bullshit stops now, and as punishment for his asshattery, the party shall no longer be hosted. Future parties are A-ok as long as he asks EVERYONE (who pays the bills and/or lives in the house) in advance.
-Angry Alpine