There are a couple of things people do to let their guests know that they do not wish children to attend the wedding. One of the ways is to state on the invitation the following:
“Our ceremony will be formal and our reception will feature an open bar. We have planned what we hope will be a very enjoyable adults only event. Thank you so much for understanding.”
Another way is to have “____ seats have been reserved in your honor.”
If you have more questions about Wedding Etiquette, check out WEDDING ETIQUETTE SECRETS REVEALED.