Surely there is a way to hack out formal and swim parties? When one throws a wedding party, the guests show up in formal wear, so would it really be a stretch to hack the pie menu to throw a party which will make them show up in swimwear (or even their underwear - a sexy party)? The problem though, would still be with making the little pixels behave appropriately. The locked doors from OFB were great, as I could make the kitchen off-limits from the thieving, fridge-raiding little bastards. I, for one, have never been to a party where it was deemed appropriate to go into the host's kitchen and help myself to the contents of his or her refridgerator. Still, unplayable Sims on free will act like...well, unfocused imbeciles.