There is a facebook made for Riichi Mahjong Community in Singapore. This facebook group is Singapore Japanese (Reach) Mahjong Group.
Usually, quite a few of us will be playing Riichi Mahjong on a popular online platform, Tenhou on Friday Night. Beside that, the facebook gruop is just a social platform for us to share news or trash-talk about Riichi Mahjong and allow us to remain contactable with each other.
If you would like to join us, please private message Mide Loh to request for his invitation to the group.