A posse of Pinstripers, including Alex Rodriguez and girlfriend Cameron Diaz, Nick Swisher and his new wife, actress Joanna Garcia, and Eric Chavez and his S.O. dined at Ken Oringer’s Toro Saturday night and then headed over to Whiskey Park for some late-night libations. (Garcia is best known for her role on the CW sitcom “Reba.’’) . . . Yankees Derek Jeter, C.C. Sabathia, and Jorge Posada dined at Lydia Shire’s Scampo. (We’re told Jeter’s actress girlfriend Minka Kelly was in town, but she kept a low profile.) . . . Former Sox player Kevin Millar got his “cowboy up’’ at Nick Varano’s Strega Waterfront along with ESPN’s Steve Levy, actor John Fiori, and comedian Dave Russo. . . . Meanwhile, Sox pitchers John Lackey and John Lester ate at Strega North End, where Celtic Jermaine O’Neal was at a separate table. . . . A few of Buffalo Tom’s famous fans were hanging out backstage after the band’s smokin’ set at the Paradise, including “Little Children’’ author Tom Perrotta and “Glee’’ guy Mike O’Malley. . . . “Tik Tok’’ singer Ke$ha kicked back at the Nine Zero Hotel, doing shots of Ciroc with some pals. She performed at Babson’s spring festival Friday and is at the House of Blues tomorrow.