Spark Ignite has an awesome feature where you can create a very awesome birthday party RSVP page. Not only does it make you look very professional, but it helps you track the registrants, attendees, and re-target them after the have shown up. You can even have them sign a waiver after they RSVP saving you time.
The video below will show you how to quickly and easily create your very own RSVP page.
If you want to know how to create a waiver click the link below.