Parent's Day

When it's known that 'Parents Day' is approaching at Faber, Hoover and the rest of the Deltas decide to somehow to trick the rival Omegas into leaving town (and away from campus) so they can switch the Greek letters on their house and the Omega's house so the Deltas' moms and dads will be visiting them in the clean Omega house, while the Omegas' moms and dads end up in the messy Delta house.