I was a member of a Tibetan Buddhist group for about 3 years. I didn't feel very comfortable for the last half year. I don't think I can accurately sum up all my experiences, but the part that is relevant to this discussion:

• Local groups strive for harmony and affection via common activities and lots of physical contact (hugging etc.). This isn't quite as formalized as you propose, but still a deliberate part of the group structure.
• This does work rather fast, and raises happiness (for a time for me, indefinitely for others).
• Unfortunately, this also made it emotionally unpleasant for me to voice dissent/argue when I disagreed with something, especially when it was about something where I was the minority.
• As a consequence, today I prefer to develop such bonds slowly.

I'm not sure how this applies to your proposed structure, but I fear that it's implementation may lead to the above, simply because people like the same things you do. You do not need to force them to participate (neither was I), but they do so out of their own free will. The negative consequence I described may still happen, if many people adopt your rules and develop Affection for a large group of people they don't know well quickly.