How about any of the following:

> - clique, or cliquish

> - clan, or clannish

> - snobby

> - pompous

> - pretentious

> - highfalutin

> - society's crème de la crème 

> - upper crust

> - aristocracy, aristocratic

> - a monarchic (or monarchical) group

> - high society

> - *haut monde* or *grand monde*

> - *coterie*

> - *nouveau riche*