Eat, Drink, and Read Harry Founded by: MEEEE!!!! (Lily of Ravenclaw)
For discussion of all that are HP, Fanfic, or completely off topic things.

Beta Readers United Founded by: KittenGirl555
A place where you can go to get your Harry Potter fanfics betaed. It's cool.

TFB
Founded by: Tricia Bingerbongers
TFBs stand for Teen Fly Butterflies, and it's for girls only.

Disrupt the Sanity of Earth, aka DSE
Founded by: Emmy/chix
One of the original Harry Potter clubs. Very fun.

METMA
Founded by: METMA Mandy
This is the official mailing list for METMA (Muggles for Equal Treatment of Magical Articles) members.