Has anyone mistakenly called you by the other gender in a store, restaurant, etc.?

Ok so a few days ago, I went shopping with my mother, two brothers, and sister. When we finished getting what we came for, we got in line at the check out. When it was our turn up, this lady behind me who worked there. Was trying to get through to help other people. At first I didn't hear her until she said a little louder "excuse me ma'am", and I'm thinking to myself "wait what?". "I'm a guy not a girl!" I laughed to myself and awkwardly stayed quiet. So have you guys have anything like this happen before?