Windhollow Faire, the doomed folk-rock group from the novella Wyldling Hall by Elizabeth Hand. When I finished the book I was so eager to hear the album, then I remembered it was all fictional!
Scum Of The Earth: Who were actually Michael Des Barres and his band Detective, minus the two actors ("Blood" and "Nigel").
'Marvin Berry and the Starlighters' played at the Enchantment Under the Sea dance in Back to the Future
Ten bands mentioned in A Clockwork Orange, three of which since inspired real bands to use those names (the other two are a coincidence I think): -- Heaven Seventeen: Heaven 17 is a New Wave/Synth Pop band from Sheffield, England, active from 1980-present Johnny Zhivago: Johnny Zhivago was a Punk Band from Essex, England, active from 1999-2002 The Humpers: The Humpers were a Garage Punk band from Long Beach, California, active from 1989-1998 The Sparks: Sparks are a Rock/Pop band from Los Angeles, California, active from 1970-present The Legend: Legend was the name of an English heavy metal band, a Shadows tribute band, a christian rock band, and a rockabilly band The Blow Goes Bread Brothers Cyclops The Comic Strips Goggly Gogol --
Two pages in and other than a sneaky reference to an earlier incarnation in the OP, no mention of the greatest of them all: the legendary Spinal Tap! At the time of the original movie they were clearly fictional, although they sort of morphed into a concrete satirical group in the '90s. Edit: They were mentioned, I just missed it somehow! Sorry!
And let’s not forget Captain Geech & The Shrimp Shack Shooters, a fictional band played by the fictional band the movie is about.
Mystery from Detroit Rock City Mission Control / Anarchy's Child (and other band name changes) from Freaks and Geeks The Eradicators from Rock N Roll High School Forever The Tritonz from Rock N Roll Nightmare Sammi Curr from Trick or Treat The Loaded Blanks (played by Great White) in Maid to Order Johnny Squares (played by Jim Carrey lip syncing GNR) in The Dead Pool Black Plague (Vince Neil and other notable metal musicians) in Adventures of Ford Fairline Dingoes at My Baby from Buffy the Vampire Slayer The Ain't Rights from Green Room Vince Raven (played by Alice Cooper) in Monster Dog ...off the top of my head