Due to our venue and budget, we want to have an adults only reception. However, we have a lot of guests coming in from out of town and understand they will bring their kids. With that said, we realize that we can not prohibit our local friends from bringing their children, which will add a significant number of people to our guest list. We thought about offering a babysitter service, but it would have to be offsite as the venue is an art gallery and doesn't have a separate room. How do we deal with this situation?