Some workplaces encourage a casual, hip style while others require more standard business attire.
Truly I think almost anyone can wear denim at work as long as you wear appropriate shoes & feel at ease with it.
For me to feel comfortable in denim at work, I have these requirements:
1. The denim has to be a dark rinse, gray, black, or a color.
2. Ideally it's a skirt or dressy jean style.
Here's my search for denim options for the workplace...
I splurged a little & tried this Garnet Hill skirt since I thought I'd wear it so much. Once it arrived, I tried it with several tops & different shoes, but in the end, it just felt awkward to me--I returned it. (In the skirt's defense, if I pay full-price for something, there's a good chance I'll be returning it. I just expect too much from it.)
Do you wear denim to work? What are your requirements for it?