rec.music.phish - join
Discussing the musical group Phish.
Low activity, 1587 subscribers, Usenet

rec.music.dylan - join
Discussion of Bob's works & music.
High activity, 1819 subscribers, Usenet

rec.music.artists.springsteen - join
Forum for fans of Bruce Springsteen's music.
High activity, 1554 subscribers, Usenet

rec.music.rock-pop-r+b.1970s - join
1970s Rock, Pop, Soul, and Rhythm & Blues music.
Medium activity, 522 subscribers, Usenet

alt.music.who - join
Enduring megagroup.
Medium activity, 333 subscribers, Usenet

alt.fan.frank-zappa - join
Is that a Sears poncho?
Medium activity, 466 subscribers, Usenet

Grateful Dead - join
A gathering place for sharing the grateful dead experience...
Low activity, 76 members, restricted

Grateful Dead Fans - join
Peace!!!This is a place whare we can talk about the Grateful Dead and Peace and Love!!!!
Low activity, 51 members

Trey Anastasio - join
The Trey Anastasio Google Group (TAGG) is a place where phans can meet to discuss and celebrate the ongoing expansion of his music and all the joy that comes with it. This is a public forum. Anyone can join and contribute. No BS, just Trey
Low activity, 341 members, moderated, restricted

rec.music.beatles - join
Postings about the Fab Four & their music.
High activity, 1905 subscribers, Usenet