Are there any parents raising children aged 3–6? Parent meetup

There is talk among the kindergarten parents about having a meetup on the weekends.
Is there really a need to create such a group?
Right now, on weekends, they spend time with grandparents and relatives, or they play freely at places children love.
I'm wondering if it's truly necessary for parents to arrange time for the kids to play together with other children.
It seems like a recent trend.