salah, siao keng was at lor buangkok. i often play football at its field when i 14/15yo, which have two 1-armed bandits at the canteen beside the field which was quite amazing as only safra clubhouse operate jackpot rooms during those days.
even current location also not hougang but buangkok. During my schooling period, those escaped siao langs can be seen wandering at jalan kayu/seletar but i seldom see them in hougang.
i think hougang area got 2 seperate tongs, 1 at around lor as soo while another ard ave 7 market. during the late 80s/ early 90s, only 2 ah beng schools, holy innocent high and yuying sec. yuying still as bad nowadays wheras HIHS have turn over a new leaf.