TORONTO—Carlson, a global hospitality and travel company, will officially launch its new hotel loyalty program, Club CarlsonSM, on March 31, 2011. Formerly known as goldpoints plusSM, the new program offers members an enriched array of first-class redemption opportunities and enhanced benefits, as well as new vacation options through a partnership with Club Med®. To support the launch of Club Carlson, Carlson is offering a “Stay Twice, Earn a Free Night” offer at any of its more than 1,000....