I just went to Pegs Forum, probably as good as an example as any of a social group forum.

When I'm looking at a thread in that forum, the links at the top of the page read:
Forums at Psych Central > Social Group Forums > Pegs Forum
(title of the thread)

Clicking on the Pegs Forum link takes me to the Pegs Forum Index.

In the Forum Jump menu, the 6th item from the bottom is "Social Group Forums". If I select it, I don't even have to click on Go -- I get taken right to a listing of social group forums including Pegs.

When I'm on the Index Page for that forum, there seems to be no direct link to the Social Group. However, I can get to the User Control Panel either with Forum Jump or by clicking My Profile. Once I'm at the User Control Panel, there's a link in the left sidebar for Social Groups.

When I'm on the Pegs Forum Social Group page there's a link at the upper left, right under the "Pegs Forum" title, to "Visit the forum of this group."

All in all, it seems a little easier to navigate from the social group to its forum than the other way. Between the forum and the individual threads, though, it takes only one click in each direction.

Does this address your question, pachy?