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by Michael J. Shapiro | September 26, 2012

 Hotel search engine Room Key has partnered with three more hotel companies. The newest partners -- La Quinta Inns & Suites, Millennium Hotels & Resorts, and The Leading Hotels of the World -- will double the number of properties on the site when their inventories are added later this fall. The new partners join founding members Choice Hotels International, Hilton Worldwide, Hyatt Hotels, InterContinental Hotels Group, Marriott International and the Wyndham Hotel Group. Room Key reports that its website, which launched in January, is getting 14 million visits per month, according to Google Analytics.