You Can Tell it's Friday Afternoon

The office is quiet and Spring is in the air. We've got 2 sales reps, 2 development engineers, 2 telemarketers, 1 sales engineer, 1 receptionist (well we only have one), 1 accounting and me still in the office at 4:22pm out of 35 people. I guess that's pretty good 10 out of 35. A whopping 28.5% still dedicated and working.
At 4:45pm the number will be less. Are we just working for the weekend or what?