willie nelson has a story about that during a white house performance for carter.I thought that was what you're talking about.
I heard that story too. I think I would risk an end to my vacation from pot if I could smoke on thw white house roof.
President Ford's daughters used to smoke the place up. And Tricia Nixon once invited Grace Slick [friends from school] to attend a White House reception. But the Secret Service formally requested she not attend; so the invatation was cancelled. Gracie said she was going to spike the punch with acid if she had gone.