Check out cityvibe under Asian providers.  Be sure to cross check anyone you might be interested in here on TER. Many have reviews posted on TER. I only used cityvibe once and the lady who arrived at my hotel was not the lady in the picture.  Not bad looking, and had a nice time, but not the same person in the picture, or who I talked to on the phone.  I strongly suspect tha there are multiple ladies who may show up under the same name.