As with the Apartment Cafe’s, there are several places that has set up yheir budiness as a’secret’ place, of course its not that hard time to find if you really wat to. 
It is probably a bit higher threshold for people going into allyways, and then up three flight of stairs – to get to a resturant.So you have a lot of these places, not to well signed and a bit more tricky than your regular spot. We had dinner at one of these places, food and ambience was perfect.
Secret Garden has a excelent rating on tripadvisor, and well worth the visit. I recomend the porkbelly and egg dish ! top notch
The are also quite a few bars and pubs, that are way harder to find. I had the Nuffbox marked, but we ran out of time – next time Saigon!