There isn't an anime club at our school, but there is one at our library.
Anime club at the library is actually pretty boring. All we do is watch the same anime movies over and over again and fangirl over manga in little clique-y groups. xD'
But I'm sure it'd be different in your school. After all, Iowan people are really boring. :3'
Basically what we do in our anime club is get talked to a bit and then each day we watch the first episode to a different anime. We are also allowed to eat and sit with our friends while watching anime. It's awesome ^^
My school had one until second semester of Freshman year but it was unorganized and lacked people so it got shut down. But I heard it was somewhat enjoyable. If I were in charge of an anime club I'd make it fun with theme days/weeks and we would actually have discussions about shows and maybe cosplay celebrations and stuff. I wish I could gather up my friends to do it but none of them want to do it so.... =/
I find that each school has different type of anime clubs,considering they're not run by the same person,so I would think many anime clubs are different,but one thing is for sure they do focus and talk about anime manga and things like that,probably what the club is like is general depends on the person who's in charge of it,but I find that any anime club would be cool!