Hookers at Thermae usually ask for 1500THB for full service of one hour and some great erotic fun.
If the babe thinks you are too interested or head over heels for her, she might offer you a discounted rate as she will think of you ending up with her most of the time or even getting into a relationship with her to support her.
When you take a walk from Soi 4 to Soi 3 you will see many more Russian prostitutes, but you should know that the Russians working in Bangkok are illegally there in the sex industry.
You can find these beer bars mainly on Sukhumvit Soi 4 and Soi 22.
Ladyboys are also spotted, standing and wandering around various locations.
Coming to Bangkok and being able to enjoy the actual Bangkok sex , you should follow the above-mentioned rules and keep in mind how to deal with Thai hookers to crack the best deal for yourself.