It turned out that while we had permission from the school principal, the teachers and the librarians to be in the school library, we didn't have the permission of on of the parents. This parent had just donated money to get the library cleaned up and was concerned that our presence would ruin that. They were outraged at the fact that we had our lunch sacks in the room, even though that wasn't where we ate lunch. She complained to the school office and half way through our week we were thrown out.
Overall, the first week went really well! It would be another month before did it again.