The Ritz-Carlton has introduced the World Concierge on Foursquare, a new service offering local tips from the concierges of its hotels to mobile-device users who visit the profile of the hotel brand on the location-based social media site Foursquare.com.

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Guests traveling with Virgin America are able to earn bonus points in Virgin America’s Elevate frequent-flyer program by virtually ‘checking in’ at the airline’s airport terminals, gates and other locations. Each ‘check-in’ using location-based mobile applications such as Facebook Places and Foursquare will earn guests 25 Elevate points.

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