You need Korean-speaking people to show you.
There are a lot of soap-land style places. However, some excellent places provide very interesting experience. After a normal shower, you change into shorts and jackets. A common room where you can watch Korean TV, use the electric massage chair, web-surfing or read Korean comic books.
Rooms for individual girls can be very big. You will be led to a small living room with sofa on which you sometimes get foot-washing service. Next is a bathing place with showers and a floating bed where you can enjoy the soap massage service. If you survive this part, you will be led to a real bed (sometimes on top of the bathing room with a staircase going up) for the last action.
After the heavy work, a short blind-people massage will be conducted at a different common room where mattress and pillows are provided on ground.
If you are hungry after all these, a Korean style hot spicy noodles with some soft drinks can be ordered.
Total damage is around HK$1500 depending on the exchange rate.