New York, NY – January 15, 2012 – (RealEstateRama) — SL Green Realty Corp (NYSE: SLG) today announced that WPP Group, USA, Inc. which is part of the world’s largest communications services group, with 3,000 offices in 110 countries, has renewed its lease at 100 Park Avenue covering 43,294 square feet on the entire fourth floor
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