They're open for the public yes and great place to make friends in recovery!.
All but a couple. You can Google Arizona NA meetings for a schedule.
All but Tuesday 7pm women's meeting is open to anyone.
Only some of them. If you look up meet times on the NA website, there will be a legend stating which meetings are closed for addicts/ those who think that they may have a problem versus which ones are open. Good luck.
Thanks! Your answer is awaiting moderation.