@geoffkait
I heard her free concert on the mall in 1971 when I was at GWU. Did you ever go to the Red Lion pub? There was also a pizza place we frequented (if you can call anything they served in DC real pizza - I'm from NJ) but I can't recall the name. It began with an N I think. And a great deli down by Watergate.
Also heard Neil Young at a club in Georgetown. Someplace with a horse in it's name. And then there was the all-night bakery, Kumpits, when we got the munchies late at night.