Some of the best experiences I’ve had in Bangkok, were at the entertainment complexes in the Ratchada area. Here you will find dozens of hotels, spas and entertainment complexes with hundreds of beautiful elegant women willing to server you. This is primarily and Asian tourist area and the women are more to the liking of Chinese, Japanese and Korean tourists. The women are largely university students and look like the kind of woman you would bring home to your mother. Not the dark, trashy, slutty, prostitute looking type that you find in Nana and Soi Cowboy that most western tourists seem to love. These women are less common than their Nana counter parts and are desired more by the wealthy Thais and Asian tourists. Therefore the prices at these establishments can be much higher than what western tourists are willing to pay. However the service is well worth it if you like this look.
If you are lucky enough to like the darker Isaan girl look than Nana, Soi Cowboy and PatPong are definitely where you want to be. You might also consider Pattaya or Phuket for your entertainment needs.