Missing: "Throw Party" Option

[Guy In A Small Room]

Here's a puzzler:

My sims no longer have the option to "throw party."
I usually don't bother, save for the university graduation party.  Now, it only says "Move back to Pleasantview."

I completely removed the Downloads folder, and the problem persists.  So....it's not any hack.

(I have all of the expansions, down to Apartment Life.)

Any thoughts?  Suggestions?  Household tips?

[Zazazu]

How much time do they have left? If it's too low, the option disappears.

[Guy In A Small Room]

They're recent grads.  They have the full 72 hrs.

Other students, who haven't graduated, can't throw any other type of party, either.

[GayJohnScarritt]

   Even tho you said you removed your downloads folder, stray hacks can come in thru dowloaded lots and/or collections folder.  Try backing up the entire Sims2 Folder and then backup that Neighborhood, remove the Sims2 folder and let the game spawn a new one.  Put that Neighbood back in, go in and then see if the option is there.  If it is, then you've got a stray hack conflict hiding somewhere. 

[seelindarun]

What time is it?  You're not trying to throw a party at 3am, are you?

[Guy In A Small Room]

Seelindarum:  It's at all times.

GayJohnScarritt:  Thanks for the suggestion.  I'll give it a go.