I know for a fact that in the "little Korea" area of TST, Kimberly Road and Kimberly Street, there are a number of "room salons" which are Korean Karaoke places. These exist for the Korean business men, both locals and overseas visitors. Unless you are Korean or the guest of a Korean you were already as close as you are gonna get to these girls.
I suspect that is what you saw, reporting for work.