Guests at Ritz-Carlton properties step into the lobby, which exudes the chain's signature scents -- each luxury hotel has a different aroma. They also leave with a spray bottle of the scent as a keepsake, another move to reinforce the hotel's brand. Westin, W Hotel and Sofitel are just a few brands that have created signature scents. "This kind of olfactory-induced nostalgia is a powerful driver, and one that hotels cannot ignore," said Alan Hirsch, founder of the Smell and Taste Treatment and Research Foundation in Chicago.
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