When I was a kid, the town I grew up in had a town funded "TEEN CENTER".
It was a safe place for teens to gather, play music, dance, and socialize.
There were adults present, but they were in the background.
Perhaps these elite, affluent communities, along 30a should each consider funding
one within their community. {goodness know they have the money}
Give the kids a place where they can "get away" from the parents, yet not be running wild on the beach. Might be worth a try.