The conversations around the water cooler take a turn for the intellectual at the beginning of the week. Suddenly you feel like you're in college again. What's surprising is how much fun a light debate (that has nothing to do with work) can be. Wednesday and thursday leave you with little time for chatting with coworkers. You are calculating figures, making calls, writing emails. But friday is another day of non-stressful banter and fun. It feels good to be so happy at work. That's what you're thinking as the weekend begins.