The “Real Housewives of D.C.” cast united Monday for a taping of their reunion episode, a source tells Yeas & Nays. We hear that the show was taped at the Historical Society of Washington, D.C., near the convention center, but a spokeswoman for the Historical Society wouldn’t confirm. The cast members we contacted stayed hush-hush about the special, though we assume that it won’t be as crazy as the “Real Housewives of New Jersey” reunion, in which housewife Teresa Guidice shoved host Andy Cohen.