Sure, wearing a blazer with a wild lining on casual Friday with jeans or khakis when everyone else is dressed down sounds good. Heading out to a bar, even better. But, no matter how conservative the jacket, with a lining like that, you better not be a high-end transaction attorney and show up in a clients office. Even if your client is super casual. That would be my position. Ahmet Ertegün was the president at Atlantic records. He was a well dressed guy. Maybe the best in the entire music industry. In an interview someone asked him why he always dressed so nicely when he was hanging out with casual dressed rock stars. He said something along the lines of , "They want to see the guy who handles their money wearing a suit and tie. It gives them greater confidence in you".