I just came up with a great idea for a game you can play at home! All you need is a cell phone, a high school education, and a group of drunk friends. Here's how it works...
Think of someone you knew at least 10 years ago, either in high school or college, but that you lost touch with completely after graduation, and so did (probably) everyone you still keep in touch with.
Starting with only the numbers currently in your cell phone -- no fair using outside sources like the internet -- call one of those friends you're still in touch with. You're only allowed to ask them for a phone number from their cell phone.
(Note: If you're too old to own a cell phone, I guess you can use your address book or rolodex or whatever old people have.)
You have one hour, during which you'll phone people you haven't spoken to or thought about in a decade, to find the person you had in mind in the first place. And you're not allowed to tell anyone why you're looking for this person, either.
If, within the allotted hour, you do manage to get this person's phone number, then you must call them and keep them on the phone for 15 minutes while you catch up in front of all your drunken friends, who watch in rapt attention as a completely awkward moment unfolds before them.
Well, now that I'm writing it out it doesn't sound so awesome.