Always dress to impress. Even if the job is a jeans and t-shirt type of job. The philosophy I learned, in my case, show up for the interview dressed in a suit, even if you know the person interviewing and their attire is the opposite. After the interview and being hired for the position, you will have earned the right to dress for the job. Yes, there are exceptions, but your appearance is a big selling point. Now, how that applies to ladies, I'm no way an expert, just choose carefully.

Yes! Always dress to impress on an interview, even if the workplace is considered casual.