Ang Soon Tong >Most of AMK(307, 608,721,505,339), block of
200+s in AMK belongs to 21 Tiong.Sengkang(defunct recently),
Serangoon, Bukit Batok and Yishun.
369(From what i heard split into many factions and they fight
amongst themselves)> Toa Payoh, Bishan, Clementi, Teck Whye
....etc etc
24 Sio Lo Kuan >Desker road, Far East plaza, Orchard Cine, Plaza
Singapura, Toa payoh Lor 7.
24 Ang Kun >Bishan, Redhill.
23 Sin Min Lu (defunct)
21 tiong
21 ghee lian sia
08 hai lok san
There are more gangs..cant remember all.
To be frank the smaller gangs are more formidable and better and
they practise better membership control..