Club Leaders and Subleaders can recruit users from Academies to their Club. 

To recruit Academy users, go to “Club” and then tap the “Club Search” button at the bottom of the screen. In the “View Academy” tab, tap an Academy, then tap the “Invite” button to the right of a user.  

Only users that have enabled “List Yourself” will have an “Invite” button displayed, so if not many users have enabled this option, the number of users available to invite may be low.