@Convergence Lordy Lord, those are employees. Look at your visitor stats, it wasn't until the past year that 1024X786 wasn't our most popular screen resolution.
Keep this in mind when you compare; our weekend traffic is about 20% less than weekdays.
Here's a cute spike to watch for using Analytics "Real-Time", right before the top of an hour when people go BACK to work from lunch. Don't know if you'll see it in your niche, but the last five/ten minutes of the common lunch hour 12:50-1pm is one of the highest spikes of the day for us, the next is the after-dinner crowd that's like what @frankleeceo mentioned after work.