I have a pub lunch planned this weekend with 2 ex colleagues, it's been planned for a few weeks.
I have an adult child, my other colleague has no kids and the other has a 14 year old.
The friend with the 14 year old has asked if her daughter can also join us as it will save her an extra 10 min car journey later in the day(?!).
I've got nothing against the girl but it completely changes the dynamics of the meet up when people do this. I had another friend who would invite her teenage daughter along to every meal, coffee etc. and in the end I had to say something along the lines of "shall we just have an adult only lunch this time?".
I completely understand if people have very young kids and can't get babysitters etc but this isn't the case on this occasion.