Hello @Will Roberts,

In current Messenger version you can not create groups in Messenger manually with certain participants and sub talks in it, but it is possible to create several Talks with the same set of users and threads based on messages from the Talk (Thread will be created with the same set of participants). Also it is possible to create any number of Talks connected with any page and on main messenger page or on page with the Talk you can see the all sub talks connected with this page.

For example: you create standard Group in UNA Groups module, then activate Messenger block on this Group's view page. Now you can create on Main Messenger page any number of sub Talks for this page with the all participants of this Group. Thus you may have group of the talks on Messenger page.