If you're staying in any big international chain like Sheraton, Crowne Plaza, Hilton etc. then they've had a big crackdown on masseuers offering extras in their massage parlours after stings in recent years, the ladies are scared to get arrested or fired (prositution is technuically still illegal), and it's unlikely you'd get anything on a first meet. Don't push your luck as you'll find yourself ejected and reported to the hotel. Avoid any outcall agencies as they always send the women to your hotel looking like obvious prostitutes (think high heels, mini skirt, makeup to the max), plus receptionists have been warned to look out for them.