"We have to clear all of the decks, section by section, with first priority to guests with special needs and children, " said Gulliksen.

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We get an insight to how hotels carry out tests to ensure they meet the needs of their guests at Starwood's hotel lab for its budget boutique subsidiary Aloft in New York.

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The staff will customize treatments to a visitor's particular needs and will show guests how to maximize the benefits of the spa's water circuit.

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