If you scan through all the groups on Facebook and can't find one that fits your needs, no problem—just start your own.
To start your own group:
From the Applications menu, choose Groups.
On the right-hand side of the Groups page, click "Create a New Group".
On the "Step 1: Group Info" tab, fill in the text fields. You have to fill out some fields—like Group Name, Network (the network whose members you want to join your group), and Group Type (such as business or sports)—while others are optional. More is better: Details make it easier for prospective members to understand the purpose of the group, and make it more likely that you'll attract the kind of people you're looking for.
If you want an egalitarian group that anyone can join, leave the "This group is open" radio button turned on; scroll to the bottom of the page and click Create Group. Otherwise, you'll want to turn ...