We had about 100 people to our wedding, with no kids* (except my niece and nephew who are teenagers and very close to our family) My back of the envelope calculation is that if our friends and family had bought kids we'd have had another 40 or so people, no way could we have afforded that so we'd have to have not invited about a third of our friends but - to be honest the no kids thing absolutely makes sense to me - i don't really know half my friends kids that well anyway. I love getting rid of mine when there's a wedding, they find 'em boring anyway. All our friends with kids and babies came anyway. I think new borns are a different matter, but kids and toddlers? not for my wedding. However, If people have a no kids wedding they then do have to accept some people won't/can't come without getting upset I agree. But at the end of the day it's up to the wedding couple so, in the spirit of non-crticisng parental skills, who is anyone to criticise who they want at their wedding?? * our eldest daughter was 18 months she came for the ceremony and then went off with her childminder to let us party...