Guest book idea: Have someone in charge of taking Polaroid pictures of the guests as they walk in. After the picture is taken, have them insert them into self adhesive photo corners in the sign in book and write a note next to it.
Instead of the same old guest sign-in book, we set up a Polaroid photo book for guests to sign fun photos of themselves throughout the night. Man, are those pics fun to look at even now! Cute chalkboard sign was made by my sis.