Every one here in the office is really casual, it's not just that it is Austin, it is also becuase it is a manufacturing, engineering hotbed with a ton of very bright software and hardware engineers, we have pool tables and big leather couches in the common area, there is a cycle ride most days, the guys play ultimate frisbee at lunch.
I remember something Phil Gross, my boss back at Chemical Bank in 1983 said to me. He said "you've got to dress how you want to be treated". Today I had some key things to do, so I just wanted to blend in and be ignored.
When I first got to Austin one of the guys in the office told me when I asked about the weather over the winter, "there are only one or two days per year when I can't wear shorts". Greetings from Austin!