Question: What’s Expected at a Book Release Party?

I've never been to a book release party, which is probably why I have no idea what to do concerning the upcoming celebration of the release for my Gnomes book. I don't know whether to do a nicer, classier event, or something more wild like having my cover band play somewhere and have a garden gnome smashing contest.

So, if you have a moment, tell me: Ever been to a book release party? Did you enjoy it? Why? Any tips?

The book comes out Sept. 21, 2010!