Though this is about an experience at a Renaissance hotel in Shanghai, it has ramifications that go beyond the specific chain and the specific city, so I've posted it here.
We are at the Renaissance Yangtze in Shanghai. Three times in the last week, we received late-night phone solicitations from "massage girls," i.e. prostitutes. Last night I called the manager to complain. She told me that the caller had asked for me specifically by name and room number. I told her this was impossible -- no one in Shanghai knew my room number and name except for hotel staff. The manager suggested that it might have been our travel agent (who is located in China). I said that was impossible -- my wife (who is Chinese) made the reservation in her Chinese name and did not provide mine. The manager said she'd investigate, but acknowledged that this is a significant security issue.
I know that the massage girl calls are common in lower-class hotels, but this is the first time I've had this happen in a 5-star hotel in all of my visits to China. This gives new meaning to "full service" hotel. I'll be following up with Marrott when I return home. Aside from the annoyance of being disturbed after 10 pm in my hotel room, it is very disturbing that hotel staff are giving out personal information to criminals.
Forewarned is forearmed. (But five warned is not five-armed.

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