Tuesday evenings (usually) are the book study. The book study is often a consideration of a book that was published 2-5 years ago. Specific teachings may have changed since then, but it doesnt really matter. Your average Witness has no hope of keeping up with "current light" and just repeats what's in the paragraph. They are currently studying the book of Isaiah, which tells Witnesses that victims of child sexual abuse must have been raped in front of at least one other witness, or the perpetrator goes unexposed. Isaiah also prophesied that victims that try to expose their attackers should be shunned by family and friends for harming the organization's reputation.
Thursday evenings (usually) are the Theocratic Ministry School. Students give short bible-based talks to hone their speaking skills. You'll currently hear ancient scriptures applied to modern technology, especially the Internet. It seems that when Jesus mentioned a "faithful and discrete slave" who would give his followers "food at the proper time", he was referring to the Society's media web site on the Internet.
Immediately following the TMS is the Service Meeting. There members will be warned of the dangers of the single most powerful tool (recently supplanting television) that Satan uses to mislead Witnesses, namely the Internet. Witnesses are told not to use the Internet, not to talk about their beliefs on the Internet, and especially not to look at sites like this one, Freeminds, or the Watchtower Observer.
Sunday is a Bible Discourse. There you're likely to hear a talk about keeping separate from the world. The United Nations, being the prophetic Scarlet-colored Wild Beast of Revelation is the most vile organization ever created by man. Witnesses are to have NOTHING to do with this or other worldly organizations. Working for the UN, even as a parking attendant to put food on the table, will result in your being shunned.
After the BD is the Watchtower Study. There you'll read that the watchtower society was affiliated with the UN for a decade, agreeing to uphold the charter and ideals of the UN. It's OK, though, because they did it to gain access to the UN's research library.