Wendy Kaminer's 2002 book can serve as the basis for a discussion group -- or many of the exercises in this guide could conceivably be used on their own.
Exercises are meant to elicit thoughts and feelings of participants, and look at the rights and liberties they expect and are willing to extend to others.
Download: A Leader's Guide
Find the book: Free for All: Defending Liberty in America Today by Wendy Kaminer
Links for Wendy Kaminer and liberty:
And Many more
Also by Wendy Kaminer: Sleeping with Extra-Terrestrials
A fairly negative review of Sleeping With Extra-Terrestrials: Another Book for the Bonfire
A more positive review: Magical Thinking.