Today I was in Hartamas again! So I took a walk around the area, and will describe where all the salons and shops are (or at least some of the ones I remember).
The shops in this entry are facing towards Jln 27/70A, Desa Sri Hartamas.
Beside YOU-JUNG hair salon, there is (8, GRD FLR) SHUNJI-MATSUO hair salon.
If my memory does not serve me wrong, LOTTE convenience store, and (36G) DRY CUT HAIR salon are located a few rows apart from each other.
Towards the end of both these rows (forming a rectangle like shape) is CATS WHISKERS, a clothes boutique, which has clothes categorized by colour (useful when shopping for colour by theme).
On the same row where (12-1)PARK CHUL hair salon is, there is a GUARDIAN pharmacy, a korean language academy (HAGWON), and a Korean Community Centre for korean migrants with CIMB bank on the end of the row, as well as a korean boutique.
If you are lost, you can google "Jln 27/70A, Desa Sri Hartamas " on Google Maps. Good luck, and hope you don't get lost!