My dear coworker and friend just lost his wife last week over cancer. Some of us are planning to go to the wake Monday evening to show respect and give condolence to our friend in grief. Question rose as to what is the appropriate attire for this kind of occasion. I'm planning on wearing black, but I don't know if it's required. I think dark colored clothing that are not too flashy should be fine. Please provide your experience and opinion. All advice are welcome!!!