You're not going to go too far wrong with Jumbo: they're Singapore's largest chilli crab chain for a reason. You do pay a bit of a premium for the brand, convenient locations, views and white tablecloths, but for most visitors it's worth it given that the "authentic" alternative is a greasy table piled with chicken bones at Hock Spit Phtui in Geylang Lorong 69, admiring the sights and sounds of the car repair shop across the road.