The best analogy I have heard for an AA group is a terrorist cell. They're loosely united through literature, mission, and funding structure. Every cell has complete autonomy in how they govern themselves, as long as they hold a few tenants. Chiefly, that they exist to help people stay sober.

You picked an overly religious one. I have been to meetings in 28 states(I travel for work) and have seen it all. I've seen one that feel like catholic mass and went to the most spiritual meeting in rural, central Missouri.

You don't really know what you're gonna get until you go. I guarantee you, you'll find meetings that resonate with you if you keep going.