Who should come? Are newcomers welcome?
Anybody who wants to!
Why should people come?
To meet fellow atheists/agnostics/freethinkers.
Do attendees need to participate or can they just listen?
People are welcome to just listen as they like. I am sure everybody will have something to contribute.
How will members find you when they get there?
Personnel at the brewpub will direct them. We usually meet in the "Cellar" area.