Group organizers and members, you can use e-mail addresses to invite your colleagues, teammates, family and friends to join your groups. Click the "Invite Friends to Group" button on the upper right corner of your group profile or member/roster page.

Within the invitation feature, you can invite your weplay friends as well as send a message up to 50 e-mail addresses to non members at the same time. You are also provide with a convenient option to use your own email and send a special "join" link to connect invitees directly with your group.

Be sure to check out my past post on why start a group.