As I recall, there was one 2 year old & a 4 week old baby at our wedding 35 years ago. The majority of guests were older relatives & friends of my parents & of my husband's mother. In my dad's view, he was paying & he'd ask who HE wanted!! How different when my own 2 children were married! Although we contributed to both weddings,( substantially in our daughter's case - very traditional!) we had very little say in the guest lists, which suited us fine, it was their day & I remembered the lack of friends at my own wedding. At both, there were plenty of small children, which was lovely. I must say, however, to me a wedding day is primarily about the bride & groom and if, for whatever reason, they prefer not to invite children, then that is their prerogative.