Playing on stage at LSD parties was, I can tell you, not easy. Those damned strobe lights made seeing the guitar & bass frets and Farfisa and Voxx organ keys hard to see. Might be why the San Francisco bands were so lame, Moby Grape the lone exception. When The Band played at Bill Graham venues, they asked him to skip the light show; that kind of thing had nothing to do with the music they played.
My friend & bandmate and I were hitch hiking on San Carlos Blvd. in San Jose in ’66, and got picked up by a couple of guys who looked like they were from Berkeley (if you know what I mean). They were driving an old early-50’s sedan, had big frizzy hair and beards, and were a lot older than we. One of them pulled an LP out of a bag to show us; it was The Fugs 1st album. I don’t know if it’s psychedelic (I’ve still not heard it), but I’m sure it’s weird.