Is there no facility for public usergroups in XenForo? I can't find that functionality.
You mean groups. Sorry I'm kinda lost ...I mean public usergroups as vB has them. Members can view them via their UserCP and put in a join request for those they want to join. Approval can be automatic or they can be screened by one or more usergroup leaders. I use them quite a bit on TAZ, for the Big Boards, Launch Team, Exchange, Forum Software Designers, and Coders/Designers groups.
If that sentence made sense to you it didn't to me (and I'm not blaming you but ...)Per the vB Usergroup Manager:
Yes I have actually. I use it... just lost in the terminology .... feature not available I'm afraid with xenforo.If you've never seen the system in action, check it out on TAZ or another forum where they are in use. They rock!