The only requirement for membership in AA is a desire to stop drinking. 

Let me sum up, then, the foundational ways that I believe Jesus and the Twelve Steps of A.A. are saying the same thing but with different vocabulary:

We suffer to get well. We surrender to win. We die to live. We give it away to keep it.

This counterintuitive wisdom will forever be resisted as true, denied, and avoided, until it is forced upon us – by some reality over which we are powerless – and if we are honest, we are all powerless in the presence of full reality. – Richard Rohr OFM, Breathing Under Water: Spirituality and the Twelve Steps

http://store.cac.org/Breathing-Under-Water_p_15.html