In the U.S., different professional organizations have different guidelines, with different lengths of time required. So the American Psychological Association may have one set of guideliness and the Family Therapists professional association another. (There are at least a half dozen of these organizations. I looked at the guidelines of quite a few on a similar question, and the guidelines vary a lot.) I recommend looking at the guidelines for the associations your T aligns with.

I have a friend who has a shamanistic T, and she told me that part of how that therapy works is that you do include socializing outside of therapy (while therapy is still going on). So she and her T have dinner together every month or so. Usually they cook for one another at their homes, but sometimes they go out.