Bangkok is a big city and there are huge amount of ladies for men.
Best tip to get laid in Bangkok is to go to bar where you see girls flirting for you. At Sukhumvit Road and Patpong area the girls can be a bit easier to get laid compared to Khaosan Road where girls are mainly posh thai students trying to be hard to get.
More than 10,000 girls are reckoned to be working the trade in Bangkok, and large numbers of them are easy to pick up in bars in some tourist areas. Average metrics of Thai girl 155cm, 49kg and dark hair.
Main destinations are Bangkok, Pattaya, Nana Plaza, Soi Cowboy, Patong, Patpong, Chiang Mai.
Bangkok Sex Guide advises where to find sex, working girls, prostitution, street hookers, brothels, red-light districts, sex shops, prostitutes, ladyboys, erotic massage parlors, strip clubs and escorts in Bangkok, Thailand.
The hookers in Bangkok will happily party with you, if you buy them drinks (slightly more expensive as they include a commission for the girl).
When you are ready to take one of the prostitutes home, you will have to pay a bar fine, which is from 300 - 600 baht depending on the establishment.