Beards.
More in info:
For the record the photo of Roberts, Donald S. Scherer, and Robert Lazarus appeared in the NYT article,
http://www.nytimes.com/2005/08/21/politics/politicsspecial1/21harvard.html?pagewanted=all
From NYT article
Mr. Lazarus, who roomed with Mr. Roberts in Washington for three years after graduation, said: “John was politically conservative. He was comfortable with it, but it didn’t define his friendships. He was very thoughtful, very open talking about ideas. For some people, it’s really a defining characteristic of how they define their lives. That just wasn’t the case back then.”
Lazarus roomed with Roberts at Harvard as well as in Wash DC for three years after graduation. Passing out of Harvard Law in 1979 that places them living together until 1982 or there abouts, proximate to the time of the photo at Martha’s Vineyard.
Don Scherer. ( Donald S. Scherer), the third man in the Martha’s Vineyard photo “sometimes in the 80’s” was provide by Don Scherer. Quick google “harvard Don Scherer” seems to indicates he’s in San Francisco and might have a Facebook page.