Just a note that i've been seeing alot of online hidden camera videos taken in these places.....Mostly by people with Youtube Channel trying to get viewers by showing girls in Various sex tourist places like Soi Cowboy, Nana Plasa, Sukumvhit, Thermae Cafe etc... Not only Japs but westerners doing this also. If you search online for videos of these places, you will know what i mean. They make no effort to blur/block out faces of the guys.
For you guys that goto BKK for 'stealth' operations from home, just be aware of these activities. You may want to try look/dress a bit differently to prevent being identified in these places online. I would not be very happy if I saw a video of me inside Thermae or SC online after my trip.