As excited as you may be about an upcoming social invitation, you need to slow down and give yourself time to do some research on this event. Get a better sense of who will be there and who won't be there: and adjust your expectations accordingly. Make a plan for what you will talk about with certain people. There is a chance you can move things forward in a professional relationship, so don't miss out on it! Now is not the time to be spontaneous, even with fun stuff.