oomis1105, I work in a mixed, high pressured office. My boss is frum, so the room I sit in has only female workers in it. Most of the communication is through Instant messaging with the rest of the workers and with my boss its mostly e-mail. My boss clearly explained to the non religious men in the office that the girls are not allowed to chit chat with them for religious purposes. Though sometimes there are guys that try and we just answer yes, no..etc
I have a workmate that got a diff job, because she felt the level of tznius was not up to par.
There are some women that are very sensitive to tznius in the workplace. I respect it.