Ok wrong posting last time, this time i will get it right.
I use to stay in geylang and like to recommend the quiet coffee shops at geylang lor 15 & 17.
Geylang lor 15, 2 coffee shop, the one on left, sells very very good kway chap, the duck kidney (ar kwa) especially tender. The coffee shop on the right, my fav is the Ban Mian, can ask for dry version, penang prawn mee (but really salty).
Geylang Lor 17, He ping coffee shop, the simple claypot rice with salted egg, only weekend got those (deng tong) brew soup.
Bare in mind, all this coffee shop target dinner and supper.