Jim,
Its been there at least 5-6 years now. The backstory is that ASGCA at one time had a small office in DC.
We hired an executive director in 1970. Actually, he was ASGCA member Percy Clifford's son in law, ran a big PR firm in Chicago, and agreed to take on ASGCA on a part time basis through his firm, and using many of his younger associates. So, the ASGCA address moved to Chicago.
One of those was Chad Ritterbusch, who eventually left and started his own PR firm in Brookfield. When Paul Fullmer retired, and we needed a new Ex Dir, we sought out Chad and his firm under similar circumstances.
And now you know the rest of the story.