Basia Mowiska, a 24-year-old room attendant from Poland, who had worked for Hotelcare at Park Plaza Riverbank Hotel, said she thought the hotel guests would be horrified if they knew what happened behind the scenes.

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And so for four months in 1998 he ran the trio through the paces in the gym of the Park Plaza, an old hotel in a seedy section of Los Angeles.

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The Plaza Hotel's famous Oak Bar and Oak Room, featuring stunning views of Central Park, are currently closed.

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