There used to be a time when children were not the center of every moment of life, when not a single person would be up in arms about excluding children from an adult event. Too bad those days seem to be in the past in America - they are still alive and well in most other cultures. If you can't find or afford a sitter, don't go to the wedding. It's that simple. It is unbelievably entitled and rude to just discard a host's parameters for their event.