A fellow member of my 12-step program "home group" is an Episcopal priest, so it shouldn't come as a surprise that we often talk about spiritual things before or after a meeting. One of our memorable conversations was about the similarity between going to a meeting and going to a religious service.

Sometime around the middle of the service or a meeting, a basket will be passed around for voluntary contributions. In both cases, this is usually a time when announcements will be made about upcoming activities and news about individual members.
Religious services and meetings both close with one or more prayers asking God or a "higher power" to sustain the members until the next time they can gather together.
The last two similarities apply more to Christianity than to other faiths. First, during many Christian services the members will together recite a creed that outlines the tenets of their faith. During many meetings, one or more members will recite from something that describes the basic tenets of the program, usually the steps, with some parts recited in unison. Second, most Christian faiths either require or allow for confession -- non-specific group confession or individual, private confession with a priest or minister. 12-step programs include a fourth and fifth step where a member first seeks to identify personal "defects" and then shares them with another trusted member. In both cases this represents an "unburdening" that is intended to cleanse the soul and/or the spirit.
I'm very fortunate to be a member of both kinds of groups -- two lively communities of diverse members where I can learn how to really "live" life, share problems and solutions, give and receive support in times of joy and sorrow, and gather with others in recognition that it really isn't "all about me."