Can you add the functionality to invite as Zwifter to a Club you already belong to, similar to inviting a Zwifter to a Meetup that you create? Thanks!
I think this already exists. When you are in the club on companion app there is an option to “share” the club. Go into the roster section and you can invite a specific person from there too.
The Share option only allows you to copy the link to the Club.
The roster page is only available if you are an admin.
I want to just use the plus feature 
, like on the Meetup setup.
Well maybe the admin doesn’t want everyone inviting people to the club? Share the link and they can request to join. Not all clubs are wide open to the general public.