At my first "big boy" job, on several days I was able to get everything I needed to get done in the first hour or two of the day, then I would read the news, browse forums, casual internet browsing.. but doing that became tiresome, so I installed WoW and casually played while at work. I had my own office then so there was relative privacy.
Now, nope. I just browse forums and read the news when i have some time. I leave the gaming for when I can really focus in on it at home.