Thailand is a heaven for hobby. Girls are eager to please hobbyist and it's quite cheap when paid in US Dollars.
I was in Thailand early November. I went to all three of the Red Light areas (Soi Cowboy, Nana Plaza and Patpong. In my opinion, Soi Cowboys is best out of three. Nana Plaza is bigger but full of lady boys acting like girls. At Soi Cowboys, they are all quite honest about gender. Soi Cowboys is pricier than other two, but $1 = 38 Thai Baht, it doesn't make much difference.
I liked Shark Bar and Doll House. I recommend going to couple of bars and then asking a lady to go to hotel with you. They ask for a "Bar fine" which you pay to bar to take the girl out (typically 1000 BHT) and 3000 BHT for the girl. Do not publicly ask if you can have sex or what the girl will do. They all do pretty much anything that rocks your boat.
There is no one shot rule or time limit if you treat the girl well. Both days I had different ladys in my hotel who spent 3-4 hours.
You will love the length they go to make you happy. I was so happy both nights that I gave them hefty tips, although, they don't ask for it.
Communication is a problem but the girls make it up with their service.
If you are visiting Thailand and have questions, ask me here or direct message me.