[Alumiyum]

That will probably depend on your campus culture. I believe (have been told and read, but if I'm wrong about the following, please someone more knowledgeable correct me!) that many sororities and fraternities have religious elements ranging from minor to major in their rituals. That's something to keep in mind, but ritual isn't discussed with non members. So you probably won't be able to know before joining whtehr or not the organization does or does not have any religious elements to ritual. You do not have to be of a certain religion to get a bid, and whether or not many members are of one religion or not will probably depend on the general campus culture. Talking to someone who is from your school might help. If you know any current students, ask them what they think.

I will tell you that I went to a southern campus with many NPC women that were very actively (and sometimes loudly) Christian. If I had to give myself a label it would be agnostic, and very rarely did anyone ever even bring it up. I just didn't talk about religion myself, except to occasionally remind people gently that not everyone in the chapter was Christian and we should all be respectful of each others' beliefs. But then, being agnostic and atheist are two different things. I don't think you will have trouble with other members, but whether or not you will be comfortable around others who are religious is something to keep in mind.

If it were me I would just keep an open mind and if I were offered a bid, accept it. You'll be able to get a feel for it as a new member and you'll be able to talk to actives who can address your concerns if it warrants discussion. Then you can go from there depending on the situation.