sentences:  In October 2010, Washington, DC Mayor Adrian Fenty officially commended Karlan for Professionals in the City surpassing a membership of 200,000 in the Greater Washington, DC metropolitan area and for enhancing the quality of life of residents of Washington, DC.In February 2011, Karlan hosted the nation's first-ever speed dating at an auto show, at which Washington Post columnist Carolyn Hax provided advice on dating and then the speed daters went from car to car in the General Motors exhibit at the Washington Auto Show participating in a different date in each car.In March 2011, in a feature that also includes Donald Trump, The TODAY Show featured Karlan at a Professionals in the City speed dating event to show how body language affects one's success in dating.