What is it like to take a bath in Fengshun Tangkeng?

There are many types there, including private room-shaped ones and swimming pool-shaped ones.

The bath you are talking about is probably the kind where many people bathe in the same pool. As soon as you enter the door, you tell the boss that you want to take a bath, and then they will ask if you want a towel, or if you should bring your own. You buy their towels, then you can take off your clothes and jump into the pool for any time. When you come out, you have to pay for the bill and towels.

The double you are talking about refers to a private room, where you and your girlfriend can have sex together.

If you are not familiar with it, I recommend you to visit Qianjiang. It is cleaner and more expensive, but more fun than those small shops.