Houseparty.com on a regular basis than get with it! Even if you are not into the couponing, saving money thing, this is an opportunity to host a party with free items supplied to you! You decide what parties interest you and apply. When you apply you fill out a short questionnaire, they send you a confirmation email link you click, and then you wait to see if you are chosen! I have been selected several times, Oscar Mayer party, Wizards of Waverly Place party, Green Works party, Digiorno party (my fave), and so many more!
Here are some parties I have personally applied for recently and you can too:
McDonalds and Shrek
There are several other parties available check here!
Keep an eye out for when new parties are accepting applications, you can also sign up for email updates.
Good luck and let me know if you get accepted to have your own Houseparty!