"You canker blossom!" 3 Shakespearean Insults
also clubhouse, "place of meeting and refreshment always open to those who sre members of the club," 1818, from club (n.) in the associative sense + house (n.). Clubhouse lawyer is baseball slang by 1940s.
Having to do with routine and sometimes shady urban partisan politics: Dinkins, 62, is a classic clubhouse politician (1960s+)