As an adjective clubby
is resembling or suggestive of a social club or clubhouse: congenial and exclusive.
As a noun cubby is
a small, confined space.
clubby
English
Adjective
(er)
Resembling or suggestive of a social club or clubhouse: congenial and exclusive.
(informal) Who enjoys 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.
cubby
English
Noun
(cubbies)
A small, confined space.
Derived terms
* cubbyhole, or cubby hole
* cubby house