From left: Grant Greenspan of Kaufman, Paul Milunec and Scott Gamber of CBRE, and 100-104 Fifth Avenue (credit: PropertyShark)

The online reviews site Yelp has signed a deal to take an additional 20,000 square feet at 100-104 Fifth Avenue between 15th and 16th streets, the New York Observer reported. All together, the San Francisco-based company will occupy a total of 29,505 square feet and continue New York’s Midtown South tech explosion.  [more]