I go to the hawker by the Siglap Centre - it's always happy hour

But I don't know really, I don't think the Sidewalk Tavern do a happy hour. Not sure about the Dog and Bone though, they might do one. The Vie Bar have some offer going on - $5 mugs of Tiger or something and there's the Backpacker pub which might do one. I don't really go to any of them anymore though because they're all so expensive - occasionally go for a Green Goblin at the Sidewalk but the rest of the time I go to the hawker.