Richard P.
Yelp
There are a number of places in the Arab Quarter where you can kick back and take in the scene, but Kampong Glam Cafe is one of the few where you're as likely to share your table with a local as with a backpacker. But more importantly, the food is legit (which, of course, is why the locals are there in the first place).
The Malay aunties sometimes pretend not to speak much English, and frankly can't be bothered with stupid tourist questions, but the food this great, who cares? Their lontong is a thing of beauty, and more importantly, as tasty as it looks. And the mee siam was good enough to satisfy my wife's homesick cravings.
One helpful hint to tourists - order your food at the counter (if you're sitting outside), and then sit down.