Back in 2016 I posted a conversation with John Hurd, a member of the band Tic Dolly Row/The Magnet Men, who shared a stage with Nirvana (then going by the name Bliss) at the Community World Theater in September 1987.
https://nirvana-legacy.com/2016/10/14/the-magnet-men-chad-channing-nirvana-in-1987/
Mysteriously, a cassette of the band performing on KAOS Radio in 1987 has surfaced with Chad on drums, John Hurd on guitar, Ben Shepherd (future Soundgarden) on vocals and Chris Karr on bass. The session took place under the auspices of John Goodmanson who hosted Nirvana for their first radio session in May of the same year.
Nirvana Legacy 
“Read Nirvana’s Rock and Roll Hall of Fame Acceptance Speech”. Rolling Stone. April 11, 2014. Retrieved April 1, 2016 .