Would it be improper to seek language cles at a Greek Orthodox church without subscribing to the religion?

I'm intensely interested in pursuing Modern Greek for both linguistic and cultural reasons. The only place I know in my area that offers Modern Greek instruction are the Greek Orthodox churches in the area. However, I have never been religious and consider myself atheist. Would it be improper to use the Greek Orthodox community as a resource if I might not convert? I'm most certainly open to attending services and involving myself in the community regardless of my own personal beliefs about theism.