ERE, beatniks, aye. Also what about the original hippies, before the mainstreaming and faddishness of that movement in the late 1960s United States?
I self-identify with "Gen X", but not fanatically. When I was in high school, I wrote a current events paper on the Social Security trust fund liability, and the term (for what is now Gen X) back then was the Baby Bust, contrasted with the Baby Boom, of course. I bring up this X thing only to mention another subculture with which ERE may relate, Generation X / Lost Generation / Gilded Generation / Liberty Generation / Cavalier Generation / Reprisal Generation, i.e. Nomad (Reactive):
(table apparently from the Strauss/Howe book Generations)