About the guest books-- We use guest books or sign-in sheets here. Sure, you're given a list of who is supposed to be in each party, but sometimes not everyone shows up, or sometimes things get mixed up and someone who was not on the list ends up in that party anyway. By having them sign in, we know exactly who was there and who wasn't. It makes bid sessions go a lot more smoothly, because we're not all sitting around going, "I don't remember her" when the name of a person who didn't show is called.
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