AM.jpgSmart of Sitrick and Company’s Allan Mayer to partner with Leslee Dart in the Dart Group’s newly renamed 42West showbiz flacking shop instead of go it alone. (Mayer had indicated there was another shoe to drop re his ankling announcement, but then gave that news to Variety first.) Nattering nabobs in the PR biz have been whispering to me for some time now that Dart took with her as much as a third of Pat Kingsley’s showbiz business when Dart got bounced from PMK in 2004. But Pat also boasts a big corporate business now. Mayer (photo courtesy of  jackiedanicki.com) will be the only partner based in the West Coast (Century City) offices of this NYC-based flackery, and start a new strategic communications division.