I won't count this as a report but just as some general information that I was happy to discover.
So far in Bangkok I have been traveling from where I stay near the river to the Sukhumvit area where there is lots of action. I take the BTS and once you figure it out it's all good.
Anyways, I injured my foot and it really got swollen so I've had to limit my walking.  Today I walked around near my condo and tried a little hole in the wall.  The girls wore only normal street clothes.  One gave me a bright smile and asked if I wanted oil massage and I knew there would be options.
I went upstairs and asked how much? She said 400 b for oil massage and 1000 for everything.  I thought, damn!! That's a good deal.  Turns out 1000 was for hj.  It ended up costing me 1500 baht for bbbj and cim.
The massage however was excellent.  Because this place probably does more veggie massage than happy endings she was an excellent masseuse and gave me an awesome wet bbbj.  She let me jerk my lb while she was sucking it to show her how I liked it and then she did exactly that until I popped and she kept softly milking me till all settled down.
It was an excellent experience. One of my most gratifying punts so far in SEA and pretty cheap.

Another tip...if a massage or any other girl asks you how long you here? Or do you live here? Or on holiday?  Tell them you're here for several months.  That way they try harder to get your repeat business.