Be aware that you might have new people check out your group.
A couple of things to remember with this in mind.
These may seem very obvious but they are often not followed.
1. Be sure to welcome the new person. Use names as much as possible to help people remember names.
2. Remember it will seem awkward when a new person comes to the group BUT that is no reason to alienate visitors. Please do not allow your group to become so close knit that no one else is allowed in.
3. If possible follow up with the new person. This may require you to get contact information.
4. Don't take it personally if the new person decides to go to another group.
