Wednesdays
It seems like no matter where I go, Wednesday nights are the nights for church groups to hold additional activities. Whether it is Bible studies, CCD classes, or additional prayer services, it is a sure bet that Wednesday is the day of the week to find these enrichment activities. I have always found that, especially when a church is attached to a school system, it is very helpful to have a set of Bible commentaries available where these additional activities are being held. That way when someone has a question that the group leaders cannot answer, additional resources are available to help research answers.