My girls are 8 (almost 9) and 11. They don't have many playdates. We moved about two months ago so I don't know any parents at the new school and I wouldn't let my kids go to someone's house if I don't know their parents or I don't want kids here for hours on end. Luckily they don't ask too often to have play dates. When I was that age I don't remember having too many sleepovers or have kids come over on the weekend. It was an occasional thing.