When I was working at the call center, I wore my polo shirt on causal days (usually Fridays and Saturdays). I also had my unbrella and Delta purse everyday. One of my co-workers wore her line jacket when she was cold or if it was cold outside.
What not to wear at work: I worked with a girl at the call center who was in ABC sorority. At the time, we did causal everyday since it was hot. She was a undergrad and a neo (bless her heart). This particular day at work, she came with her shirt (in the sorority's colors), the front was in big Greek letters, and the back had her line name and number (this was a printed shirt and not sewn in). She also had tight blue jeans. And remember the boots that look liked Air Force Ones? Well she had the boots in one of the sorority's colors and painted letters on the other color.