- friendly or sociable, esp. in an effusive way
- restricted, clannish, or exclusive, as some clubs are
- Typical of a club or club members.
- Friendly; sociable.
- Clannish; exclusive.
(comparative clubbier, superlative clubbiest)
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.