Unfortunately, I am inclined to think common courtesy is like common sense, is not very common any more. However, there appears to be a grass roots movement of people teaching their children the basics.
I think this is one of those, "about time" things, considering that many businesses are having to send their young, up and coming executives to classes designed to teach them manners, etiquette and social customs.
Manners is a noun.
school manners
None Manners. Manners: Resectful, Gentle, Smiling. Shocking. None Manners: Unrespectful, Bad Behaviour, Affensive Language.
Courtly manners are the exaggerated manners generally practiced at the court of a King or other Sovreign.
Can You Teach My Alligator Manners - 2008 Nature Park was released on: USA: 9 March 2011
Fashion and manners
That depends on the people with whom one associates. Many have no idea what good manners are or how they would act in polite society. For them, good manners mean nothing. For people who understand manners and courtesy, yes; manners are "in".
that girl has great manners
Edwin Manners was born in 1855.
Edwin Manners died in 1913.
Errol Manners was born in 1883.
Errol Manners died in 1953.