Col Updraft sends this link:
hmmm...he seems to have missed the money factory and the Popcorn wagon on Popcorn square.
as for Alice's Restaurant, she was a victim of over regulation: she could not afford to put in the "handicapped restrooms" , which would have required extensive renovations of the older building, so she had to shut down, reopening elsewhere but later reselling that one too.
When I worked in the area many many years ago, it was still open, Arlo and his family were still there, as was Chief Obie, who became a minor celebrity when he got a cameo as himself in the movie.
the song behind the restaurant HERE.