Thanks to everyone for the suggestions. I wound up attending a meeting of Ring 50, which meets just outside of DC in Alexandria. It's a terrific, vibrant group with a large membership. Everyone went out of their way to make an out of towner feel welcome. Many thanks to all the members I met, as well as the President, Danny Selznick, who was a fine host. If you live in or around DC, or will be visiting, be sure to check their website.
Also, I hope I'm also not on Richard's short list of three. No reason to believe I am, but it's scary to know it exists and not know if you qualify . . .