You can find working ladies in the karaoke bars in Krabi Town. Alternatively you can head to Ao Nang where there are many bars in & around Center Point or a place call Soi Sunrise. Go further to Railay & Ton Sai and you can try your luck at the full moon beach parties. Pple tell me go to Phi Phi Island got all nite beach party action too but I have not tried there