yuehan SG Cinelesiure had a HK cafe which replaced the previous suki yaki or something japanese buffet resturant. The service is good and food is great. I am not sure it operates 24 hours, if I am right, they operate 24hrs on weekends.
BillyBong SG Mr Beans at Princep St Chatterbox Coffeehouse at Meritus Mandarin Coffeeclub opp Orchard Cineleisure NYDC at Heerens (opens till 4am i think, not strictly 24h) Swensens at Holiday Inn Crown Plaza