Styles

Anthems Dance Music
Forum about modern dance music; sections include DJ mixing, dance events and "Name that song".
http://www.anthems.com/board/

Biggie Forums
Large community of dance music enthusiasts and producers.
http://www.biggie.co.nz/interaction/forum/

Blindman's Blues Forum
Blues-centered discussion.
http://blindman.forumhoster.com

Classic Rock Forums
A classic rock community discussing music and culture of the 60's, 70's and 80's.
http://www.crf2.com/

DI Forums Board
Community focusing on trance music and other dance genres
http://forums.di.fm/index.php

The Dope Spot
Urban Music Forum - Hip Hop, UK Hip Hop, rhythm and blues, Dancehall and Grime discussion.
http://www.thedopespot.co.uk/tdsforum/

Global Hardstyle Forum
International discussion about hardstyle music.
http://www.globalhardstyle.com

The Grunge Forum
Grunge-centered discussion with focus on several large Grunge bands.
http://www.grungeforum.com

Inthemix
Dance music community based in Australia.
http://www.inthemix.com.au/forum/

Stereokiller
Hardcore, punk rock, emo, indie rock music community.
http://www.stereokiller.com/boards/

Tranceaddict Forums
Large trance and electronica community.
http://www.tranceaddict.com/forums/

Trance.nu
Trance and DJing community.
http://trance.nu/v3/forums/index.php

Ungovernableforce
A Yahoo! group devoted to fans of punk music.
http://launch.groups.yahoo.com/group/UNGOVERNABLEFORCE/

Ush
Hardcore music and rave message boards.
http://www.ush.net/board/

xltronic.com | messageboard
International electronic music community.
http://xltronic.com/mb/