Rather than setting up playgroups through private messages please post your groups in the Playgroups forum
so it is available for all members to join.
This way, members looking to join a playgroup will find your groups and have a way to get to know the group online before joining in real life.
The best way to set up a playgroup is to post your neighborhood location as the playgroup title, provide the location, dates and times you wish to meet up and get everyone in the group to introduce themselves in the playgroup thread.
If you do not have access to the playgroups forum please ask for access once you have over 15 posts. You can find club info here