Allow users to assign themselves to groups, and leave groups.

Great for mailing lists, hobby groups, fan clubs, flash mobs, product updaters, and pretty much any kind subscription.

To configure simply ...

Create a new 'Group Join' module,
Select your desired group from the drop-down list,
Optionally set your 'Join' and/or 'Leave' button texts, and
Optionally set your 'Show Inheritance' switch and text.

Have fun,
Eugene Kerner.