Kids grow up fast in the rap game. These Berkeley teenagers went from exalting their kicks on 2006's "Vans" to chronicling the nuances of the dating scene in a pansexual society ("My Girl's Got a Girl Too"). As the song titles indicate ("At the Club," "In the Club," "In My Car," "Club Stuntin'"), the songs occasionally run together, but the skeletal hyphy production sounds like it was made by horny androids hardwired for hooks, and the dynamic between the Pack's four emcees is appealing.