Judging by the amount of bitterness/regret/sorrow exhibited on the 'time travel' thread to do with relationships, don't you think that a society where single people could meet up, say once every two weeks would be a good idea?
While a lot of people here are in a couple, those who aren't might get something out of it.
(Yes, I do realise that by its very nature if it was successful the number of members would continually decrease!)