[zelse]

Lots of banks and law offices, a lot of bigger name accounting/auditing/consultancy firms, and a substantial amount of government/quasi-non governmental organizations. When I started at my current government position, the only department exempt from wearing suits were Admin and IT Services, and even we had to wear polished black leather shoes, dress socks, pressed pants (trousers for you brits), and button-down long-sleeved shirts. When we won the right to wear polo shirts it was a big deal.

Fortunately, a new CEO came in and revised down our 4 page dress code to a single common-sense paragraph: "Employees are prohibited from wearing sweatpants and offensive t-shirts in the office. Personnel who are meeting with clients or presenting at court should wear business-formal attire for those meetings/events. Use common sense for all other times."