They use the air conditioning

"I know" said Claire, "we can release the gas into the main air conditioning sytem and the gas will be blown everywhere in the house getting everybody horny and we can deal with each person idividualy."

" Good Idea" Everyone said at once.

Using Kate's key they sneak into the air conditioning system hub they position the gas releasers in front of the fan and at the same time release the gas.

In the party everybody noticed a green mist coming from the vents.