Sheraton, part of the Starwood hotels group, said the new would encourage users to offer their opinions on tourist attractions, share stories, post images and swap travel tips, as part of its "Global Neighbourhood" campaign.
The website will feature content only available to Sheraton guests, including an archive of stories and recommendations that customers can access when they are planning their trip.
Chad Waetzig, senior vice-president of marketing for Sheraton Hotels, said: "We wanted to be the first hotel company to introduce a social networking website where travellers from around the world provide content by sharing their own travel experiences."
Sheraton said the website would be easy to navigate and organise by world regions. Visitors can click on to their relevant hotel, and access a guest gallery including personal travel stories and photos from previous guests.
Users will also be able to click to call and take part in live chats with other guests staying at the hotel.
As part of the website promotion, Sheraton is offering the chance to win a five-room, five-night stay for five people in any Sheraton hotel worldwide, including $5,000 spending money and five digital cameras.
In May, Starwood, which owns The Sheraton, Le Meridien and W Hotel, signed a partnership deal with Yahoo! to plug branded hang-out areas in lobbies of Sheraton hotels, called the Yahoo! Link @ Sheraton.
The pilot programme is part of part of Yahoo!'s effort to extend its brand identity "beyond the desktop".
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