SisterAct has very active email group and facebook group where members can keep in touch, discuss the latest hot topics and arrange ad hoc meet-ups and events.
For more details about the email group contact SisterAct at sisteractmembership1@gmail.com.
To join the Facebook group you can request to join the closed, members-only group here: https://www.facebook.com/groups/1456176947987094/?fref=ts