Even after all this time I still miss the Public Groups functionality of vB3, especially the ability to grant access to specific forums. I suggest that XF add the ability to have specific "joinable" forums, so that members of specified usergroups are able to choose to view the forum only after actively opting-in via a pop-up with some admin defined explanatory text. So for example a registered member might not see the "Political Discussions" forum in the forum list at all, whereas Premium or Active members might see the forum but not the contents unless they go through the opt-in process. In the meantime, are there any add-ons currently available that will provide this functionality? Might be nice in User Essentials @Daniel Hood.