there is this dim sum place at Little india there, opposite the McDonalds. i think is called 瑞春. is not 24 hours but open till quite late i think.
Boon Keng got prata place too, is just further down from boon keng Mrt station. tht's 24 hours.
Kovan hong kong cafe i think 24 hours too.
Geylang got many nice shops to eat.. can go there to try."He Ji" beancurd is not bad. but got to be careful when go there.
i like the one at river valley there, it is nice. i think nicer than al-almeen and al-alzar(coz i think their service is not really good)
Orchard Swenson close for renovation, if not can go there eat too last time