National Economists Club
This organization, located in Washington DC, "is a nonpartisan,
non-profit, tax-exempt educational organization founded to promote
meaningful discussion and exchange of views on a wide range of
issues in economics, finance, and public policy." There are some 700
members, and one of their major activities is holding luncheons with
speakers on various economic topics. They also offer written
summaries from these luncheons, speakers for embassies, and
networking opportunities for its members.
http://www.national-economists.org/