What should I do about video games on playdates?

Posted under Ask the Mediatrician.

Q: My son is entering 3rd grade and is an only child. When he has playdates at his friends’ homes, sometimes the moms allow video games above my son’s age level, usually because my son’s friends have older siblings. It makes me uncomfortable, but I’ve noticed that a lot of parents don’t appreciate it when I ask that they not play any video games during the playdate—it’s viewed as trying to control what happens in their home, or as some judgment upon them for allowing the younger child to play age-inappropriate games. I don’t want to tell my son he can never go to their houses, so do you have any advice? I usually try to have kids over to my house so that it’s not an issue, but at some point, the other parents want my son to come to their home.