I saw the GD on a triple bill (Dylan-in-leather-pants/Petty in the 1st Act) at RFK in DC one 4th of July. Weir's transmitter conked out so he had to be hooked up with an old-school wire. Early in their set they went into Sugar Magnolia. I glanced up to the catwalk to the upper deck and saw a girl grooving like it was 1967 and completely dressed for the part - red-neckerchief headband, black tank t-shirt, denim cut-offs, sandals. Can't recall any string of beads.
I took a closer look at her. She was high-school age, about 15. I did some quick math: this being 1986, she was born about 1971: after Woodstock, Haight-Ashbury, the Beatles, the Assassinations, Chicago, LBJ, Apollos 11-13 inclusive, the Miracle Mets, the Super Bowl Jets - in short, after all the long-since hackneyed media cliches of that period yet there she was, having bought into the cult package wholesale. Until, of course, she went home to Mom's dinner. Doubtless, Mom understood and approved in a way her own Mom couldn't.