CLUBBY
clannish, cliquish, clubby, snobbish, snobby
(adjective) befitting or characteristic of those who incline to social exclusiveness and who rebuff the advances of people considered inferior
clubbish, clubby
(adjective) effusively sociable; “a clubbish set”; “we got rather clubby”
Source: WordNet® 3.1
Etymology
Adjective
clubby (comparative clubbier, superlative clubbiest)
Resembling or suggestive of a social club or clubhouse: congenial and exclusive.
(informal) Fond of frequenting nightclubs.
Usage notes
In the sense of “resembling or suggestive of a social club”, the emphasis can be more on the congeniality (friendly, treating all guests as welcome insiders: compare family diner) or on the exclusivity; compare cliquey.
Source: Wiktionary