Atheist Communities.

beliefnet

If we define community as "a free and voluntary gathering of individuals with shared goals and interests -- of persons who have not so much been forced together as have chosen to associate with one another" (Harris, p. 138), then secular people, whether urban or rural, will probably belong to a number of different communities that are based on their values, political stances, hobbies, interests, and ways of living.

The reason that such people overwhelmingly live in large polyglot cities is the richness of the groups of like minded people that are available. My wife and I were early adopters of a dual income, dual parenting, atheist life style. In Manhattan I found many groups where we were not considered odd or unusual and had a choice of groups of every interest to choose from with a compatible philosophical viewpoint.
Just as an example, of hundreds of community choruses, and church choirs to choose from I joined a group whose board chose Bob DeCormier, a radical left folk arranger (Harry Belefonte, the Weavers, and Peter Paul and Mary) as its (classical) music director. Sure we sang the popular religious works, but as an example the Verdi Requiem was always dedicated by the music director to the performers of the Requiem at the Terezin Concentration Camp most of whose performers died at the Death Camps at Auschwitz, Treblinka et al.

Our children went to a left wing private school. Our Museum memberships were the Modern and Natural History as well as the mandatory Met. But even at the Met the groups we attended were intellecual groups. Please note the absense of atheism as a unifier. It probably was a fact that most of the people involved were atheist, but the political tenor of the times was that it was never mentioned, but assumed by all even the theists.