When I worked in the private sector, I just wanted to see the 'business casual' rules enforced. For males, your options were pretty simple - khakis and a polo shirt, maybe a button-down style shirt with an open collar, and dress shoes.
If I strayed too far outside those lines, I'd most certainly get called on the carpet.
Women, on the other hand, could wear damn near whatever they wanted, as long as it wasn't jeans, and there was no backlash at all. The worst offenders were the several extremely overweight women who essentially wore pajamas/jogging suits and sandals to work every day, because it was the only thing they could fit into. Pissed me off to no end.
The old dress code (while I kinda miss it) was disastrous for office thermostats. Guys in suits, long sleeve shirts and ties and women in whatever. (mean nice pants, blouses, etc.) They were always freezing and the guys were burning up.
How many office feuds did this cause.
I worked with a woman who would wear a strappy sundress showing fat arms I didn't want to see who whined all day about being cold. The guys had to wear suits at that time.
The biggest problem with womens' dress was prior to the biz casual move. At that time, they were dressing casual while men were still having to wear a tie.
I write the dress code now and I can assure you there is no sneaking around it, gender wise. Of course, it isn't very hard to follow (fairly casual), but it is strict. Flip flops are an obvious no-no.