DAE Feel like they get bad service because they look young?

My girlfriend and I both have babyfaces and look younger than we are (24/25). As a result, we feel like service experiences at restaurants and other walks of life are constantly sub par. At restaurants, we often get forgotten, have items missing, or almost ignored. Granted, we are in New York, but it's a bit ridiculous. We're also really polite so maybe that's working against us. By comparison, when I go out with my male friends we always seem to get treated a lot better.