Good question! When and how often to meet is up to you, your co-volunteers, parents, and girls. You can choose to to meet once per week, twice a month, once a month. You can also choose to meet in the evenings or on the weekends.
Where to meet can be a bit trickier: a meeting place needs to provide a safe, clean, and secure environment that allows for the participation of all girls. You might consider using meeting rooms at schools, libraries, houses or worship, community buildings, childcare facilities, and local businesses. For teens, you can also rotate meetings at coffee shops, bookstores, and other places girls enjoy spending time
*locate in Volunteer Essentials chapter 3 (Engaging Girls at All Grade Levels) page 41