Good tip, thanks Happyman. Sometimes I find myself in a dilemma too, trying to book those popular girls can be tough, so I have to search for hidden gems among the lesser known girls. Then, one day, even those hidden gems become trendy, just like Sarah or Amber, with her admirers lining up in the hallway. Crazy, right?I imagine the girl answering the phone may not be good in English. What she probably means is booked for you; please come over. I never have issues booking the girl I wanted. You can ask the person's name who answers the phone, so if anything happens, you can get the person to be responsible.
Suki at Shangri-la was another hidden gem, but now she's also gaining popularity.