I worked at the Post Office for many years. A very male dominated workforce, especially in Maintenance where I worked last. I also have resting bitch face. Not a day went by where I wasn't told to smile more and nothing was guaranteed to rile me up more. It was mostly older white guys who felt they were entitled to see every woman smile at them as if they were the greatest thing on earth. I got into a LOT of verbal fights with these guys because I was so not smiling on command like a trained dog.