I have a very large family we wouldn’t think about excluding the children form either wedding or churches.
Do you let them shriek,yell or run about during the prayers, the sermon, the communion, or the wedding vows? If so, you are being disrespectful not only of those who are there to worship, but also of the Lord's house. At a wedding, the hosts have paid big bucks to host you and others want to be able to hear what one hopes is a once-in-a-lifetime ceremony that may also be videotaped. Trust me, few people in this world think other people's disruptive kids are adorable.