1. clubbish, clubby, sociable (vs. unsociable)

usage: effusively sociable; "a clubbish set"; "we got rather clubby"

2. clannish, cliquish, clubby, snobbish, snobby, private (vs. public)

usage: befitting or characteristic of those who incline to social exclusiveness and who rebuff the advances of people considered inferior

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See also: clubby (Dictionary)