Will they call someone out for wearing PJs? Lowest denominator is what sets policies you know...Glad we don't have a formal dress policy at work. There's actually no dress policy, other than it states something to the effect of "We feel our employees can make the determination of what is appropriate to wear to work", and that's a corporate Fortune 500 company.
I wear to work what I wear outside of work, a decent t-shirt, jeans, and Nike running shoes.