one may find benefit in such a group, but the issues pertaining to vipassana practice are found at the individual experiential level, and at the universal level. through like-minded individuals may join you in such an enterprise, it may really be an unnecessary segmentation of a practice that at the root and actual level is aimed at the universal application.

vipassana is a practice of observation only, irrelevant to matrimony, religion, class, creed, occupation, etc. you would find like-minded members that you seek to unite here in this larger tribe group, as well as insight from others that may be very useful, who would not join the matrimony group you propose... why not just posit your matrimony-related questions to this group?