Group members are also invited to a group event by default.
While Facebook used to require that you ask a friend before adding her to a group, the site has since made it possible to add group members with no invitation necessary. You cannot, however, add a friend to an event hosted by your group without her approval. Send out an invitation on behalf of your group to friends if you want to ask them to join your next group affair.
Instructions
1. Go to the Facebook home page while signed into your account and click on the name of your group in the left column of the screen. If you don't see the correct group, click "See All" beneath the other groups to see the full list of your groups.
2. Click the "Create Event" link in the right column of the group page.
3. Fill out the date and time details for your invitations, then click the "Select Guests" icon. Check the box next to each friend. At the time of publication, there is no quick way to select all friends with one click. Click "Save and Close" at the bottom of the window.
4. Click "Create Event" to formally send the invitations.
Tags: your group, Click Create, Click Create Event, Create Event