Option to Bulk Invite to Clubs [by Group]

[33andrain]

I have created a club and would like to invite all members to join it. Currently, seems I can only add members one-off by typing them into the invite box. I can invite multiple members, but this is tedious. Would like to see a way to bulk invite members to a club, perhaps leveraging Groups. I realize sending thousands of invites will take time, so perhaps this is executed as a background task, like any of the others typically run.