Great piece. Many such examples exist. The Homebrew Computing Club was one,
"From the ranks of this club came the founders of many microcomputer companies, including Steve Wozniak and Steve Jobs (Apple Computer), Harry Garland and Roger Melen (Cromemco), Thomas "Todd" Fischer (IMSAI Division, Fischer-Freitas Company), George Morrow (Morrow Designs), Paul Terrell (Byte Shop), Adam Osborne (Osborne Computer), and Bob Marsh (Processor Technology). John Draper was also a member of the club, as was Jerry Lawson (creator of the first cartridge-based video game system, Fairchild Channel F).[13] Li-Chen Wang, developer of Palo Alto Tiny Basic and graphics software for the Cromemco Dazzler, was also a club member, and Lee Felsenstein was moderator of the club meetings.[14][self-published source] Steve Inness was a primary designer of one of the early cell phone touch screens as well as a business partner with John Draper.[15][16][unreliable source?] Liza Loop was also an early member and the first woman to join.[17]"
"The San Francisco Writers Workshop is one of the oldest continuously running writing critique groups in the United States, meeting every Tuesday night, except for major holidays, since 1946. Successful published authors who first workshopped their books in the group include Khaled Hosseini,[1] David Henry Sterry, Aaron Hamburger, Joe Quirk, Michelle Gagnon, Kemble Scott, Tamim Ansary, Erika Mailman, Zack Lynch, Zarina Zabrisky, and Ransom Stephens.
Tamim Ansary moderated the workshop for twenty-two years until his retirement in 2015. Currently, the workshop is moderated by Kurt Wallace Martin, Judy Viertel, James Warner, Monya Baker, and Olga Zilberbourg. The workshop is free and open to all interested writers and genres, providing a forum to share work-in-progress and receive constructive critiques from other writers. The group meets at Noisebridge, in San Francisco's Mission district."
Why Sweden punches above its weight in music
Great piece. Many such examples exist. The Homebrew Computing Club was one,
"From the ranks of this club came the founders of many microcomputer companies, including Steve Wozniak and Steve Jobs (Apple Computer), Harry Garland and Roger Melen (Cromemco), Thomas "Todd" Fischer (IMSAI Division, Fischer-Freitas Company), George Morrow (Morrow Designs), Paul Terrell (Byte Shop), Adam Osborne (Osborne Computer), and Bob Marsh (Processor Technology). John Draper was also a member of the club, as was Jerry Lawson (creator of the first cartridge-based video game system, Fairchild Channel F).[13] Li-Chen Wang, developer of Palo Alto Tiny Basic and graphics software for the Cromemco Dazzler, was also a club member, and Lee Felsenstein was moderator of the club meetings.[14][self-published source] Steve Inness was a primary designer of one of the early cell phone touch screens as well as a business partner with John Draper.[15][16][unreliable source?] Liza Loop was also an early member and the first woman to join.[17]"
https://en.wikipedia.org/wiki/Homebrew_Computer_Club
See also the San Francisco Writers Workshop,
"The San Francisco Writers Workshop is one of the oldest continuously running writing critique groups in the United States, meeting every Tuesday night, except for major holidays, since 1946. Successful published authors who first workshopped their books in the group include Khaled Hosseini,[1] David Henry Sterry, Aaron Hamburger, Joe Quirk, Michelle Gagnon, Kemble Scott, Tamim Ansary, Erika Mailman, Zack Lynch, Zarina Zabrisky, and Ransom Stephens.
Tamim Ansary moderated the workshop for twenty-two years until his retirement in 2015. Currently, the workshop is moderated by Kurt Wallace Martin, Judy Viertel, James Warner, Monya Baker, and Olga Zilberbourg. The workshop is free and open to all interested writers and genres, providing a forum to share work-in-progress and receive constructive critiques from other writers. The group meets at Noisebridge, in San Francisco's Mission district."
https://en.wikipedia.org/wiki/San_Francisco_Writers_Workshop
For more of a "scene" proper, the Haight Ashbury music scene of the late 60s,
Several bands exploded from the San Francisco scene as the Bay became the new capital of the peace and love movement.
GRATEFUL DEAD - The Golden Road
JEFFERSON AIRPLANE - White Rabbit
STEVE MILLER BAND - Space Cowboy
BIG BROTHER & THE HOLDING COMPANYPiece of My Heart -
CREEDENCE CLEARWATER REVIVAL - Run Through the Jungle
MOBY GRAPE - Murder In My Heart For the Judge
SANTANA - Oye Como Va
BEAU BRUMMELS - Laugh, Laugh
BLUE CHEER - Summertime Blues
CHOCOLATE WATCH BAND - Are You Gonna Be There (At the Love-In)
COUNTRY JOE AND THE FISH - Fixin' To Die Rag
CANNED HEAT - Going Up the Country
SCOTT McKENZIE - San Francisco (Be Sure To Wear Some Flowers In Your Hair)
IT'S A BEAUTIFUL DAY - White Bird
QUICKSILVER MESSENGER SERVICE - Fresh Air
SLY & THE FAMILY STONE - Everyday People
https://playlistresearch.com/article/haight.htm