Genteel

[Rihanna]

Possessing or exhibiting the qualities popularly regarded
as belonging to high birth and breeding; free from vulgarity, or
lowness of taste or behavior; adapted to a refined or cultivated taste;
polite; well-bred; as, genteel company, manners, address.

[Dave Paprocki]

Characterized by exaggerated or affected politeness, refinement, or respectability.

[Ernesto]

Polite,[refined] or [respectable],often in an affected or [ostentatious] way

[Luis Fok]

typical of a high social class: