WordWeb Online

1. Effusively sociable
   "we got rather clubby";
   - clubbish
    
2. Befitting or characteristic of those who incline to social exclusiveness and who rebuff the advances of people considered inferior
   "The group did not consider themselves to be clubby or unfriendly";
   - clannish, cliquish, snobbish, snobby [informal]

Derived forms: clubbiest, clubbier

See also: private, sociable

Encyclopedia: Clubby