I'm probably less sure now than I was 7 years ago about whether the Sunday School hour in most Christian churches is the best type of small group. It was the type I was most familiar with then. Now, I'd say the main requirement isn't location or time of meeting, but the ability to speak very freely about a challenging range of topics. Today, that range would include double-standards and miscarriages of justice from the halls of Congress to local district attorneys offices. Any small group that cannot handle conversations like that fails to achieve its mission. And any notion that conversations like that have no place within the church fundamentally misrepresents what "church" should be.