Perspective: You are complaining about a job that somehow let you play 4 hours of WoW while at work.
If my work can't capture my attention and use wisely the time I allocate to my group, it's going to be a negative experience for me.
As alluring the prospect, as someone who has been paid to twiddle their thumbs for a few hours -- it's not fun. It's boring and it feels wasteful.
In other words : I'd rather be at my own house doing nothing than sharing the experience with co-workers, cold lighting, and substantially less alcohol.