Jumpin' Jehosaphat...What is Going On Here?

Great googley moogley...there is something a foot. Apparently there is some mystery birthday surprise going on for me tonight. I do not know what it is. I've been trying to figure it out without prying. Here are the facts as I know them:

1. Other people will be there.
2. We can bring soda but not beer.
3. It requires us to drive, but it's not that far away.
4. We will be having finger foods.

What the Husker Du? I'm bedazzled. No clue over here.