Kind of the opposite of this thread currently going on: http://boards.straightdope.com/sdmb/showthread.php?t=597254.
Anyway, where I work people are pretty lax about the dress code. I myself wear khakis and a dress shirt pretty much everyday, and sometimes a tie. But it’s not uncommon to see workers in my office, and even managers, wearing blue jeans and polo shirts. In the summer I even occasionally see some people wearing shorts.
Also workers will sometimes bring their kids in with them, especially on snow days when I assume they can’t find someone to watch them. From what understand this used to really be frowned upon, but these days nobody seems to care so long as the kids behave themselves.