In a break to the Midtown leasing lull since early spring, Pinterest is taking 83,000 square feet on the entire 13th floor at SL Green’s 11 Madison Ave.Pinterest will leave behind 40,000 square feet at 225 Park Ave. South. The deal brings 11 Madison to 92% leased. The asking rent was $90 per square foot.San Francisco-based Pinterest is a  social media “visual discovery platform” for product-scanning and ideas-sharing. It was repped by a JLL team while  SL Green was repped by Newmark.  Eleven Madison Avenue ...