Zion Riverside Food Centre

Even with a measly 32 hawker stalls, Zion Riverside Food Centre's outsize reputation makes up for its own small size: the hawker centre's braised duck, prawn noodles, and char kway teow earn rave reviews from even the most jaded hawker eaters. Thanks to its proximity to orchard road, you'll find plenty of office workers congregating here for lunch. 

sources: http://goseasia.about.com/od/singapore/tp/HawkerCenter.htm