I lucked out at the last place I worked (a 50 person company): It was a suit-and-tie kind of environment, but the programming department (about 10 people) had our own closed-off section of the office with a Wii and a Street Fighter II arcade machine (which we used regularly).
It was weird because the rest of the company was run like you would expect a suit-and-tie place to be run, but we programmers were only graded on our results. We even used to take 1.5 hour (paid) lunches if we were ahead of schedule, and I even decided to start coming in at 10 instead of 8:30 since I would always stay until 7 pm or so (didn't ask anyone, and didn't get any guff from anyone about it).
It was weird because the rest of the company was run like you would expect a suit-and-tie place to be run, but we programmers were only graded on our results. We even used to take 1.5 hour (paid) lunches if we were ahead of schedule, and I even decided to start coming in at 10 instead of 8:30 since I would always stay until 7 pm or so (didn't ask anyone, and didn't get any guff from anyone about it).