Come 1.30 in the morning the floor was full with guests from 3 to 73 and thats the way we wanted it. But it is a personal choice and people should just respect the couple and how they want their day.
This really sums it up - it's which ever way the couple want their day.
In my opinion, the whole 'sharing with family' concept is ok but where do you draw the line? I have a couple of friends who have been my surrogate family for years. They have four children and even though I love them (the children) dearly, I don't want them at my wedding because I know how they'd behave. I also think it's unfair not to invite close friends' children if you invite family children because in reality, a lot of people have friends closer to them than their actual family. Then if you invite close friends' children and you don't invite less close friends' children.... it's a vicious circle.
That's why we felt that the same rules for everyone is the simplest and fairest way to go about it and so far we had no one complain. We may be lucky that a lot of our friends look forward to the day of child-free fun and frolicks.