A reader asks (via Facebook):
Is it OK to compliment a member of the opposite sex with totally non romantic intention on their dress or a personal feature? Talking bank teller, flight attendant, and similar. What do women in particular feel comfortable with from someone they don’t know? Nice sweater? You have a great smile? Your eyes are a beautiful color? and similar.
Not sure where the limits are, knowing that they have clearly changed, even for coworkers, and there is no way to communicate that the compliment is being given purely to be nice.