Is it a good idea to go?

[Megan]

Many people don't use Facebook nowadays. There are many privacy issues, personal info shown as public, etc. There are frauds happening occasionally. Rarely, but if you don't want to get embarassed, you could always explain that you are very careful with your info and you don't use Facebook for privacy reasons.

Or just create an account, explain to your team that it is new and that's why you don't have any friends yet.
If you don't have anyone to add, hide your friends' list (this way no one will see how many friends you have - it is in the options menu)

Also, don't really hessitate on adding people you know on Facebook. Classmates, neighbourhood friends - anyone. Really, everyone in Facebook has hundreds of people added, but only a few of them are REAL friends, most of them are just person they've met somewhere.

Don't feel ashamed that you don't have much friends... It is important to have just one, but true friend. Most of the people with many "Facebook" friends, don't even have one real.

So, don't feel bad, just go to the event.