The Roots' Kool Tour hits Rams Head Live on Saturday with Talib Kweli and the Pharcyde. The band is known for its jazzy hip-hop, which uses live instruments rather than samples and programmed beats. Rams Head Live is at 20 Market Place at Power Plant Live. Doors open at 9 p.m., and the show starts at 10 p.m. Tickets are $22 in advance and $26 Saturday. This show is 18 and older. Call 410-547-7328 or visit ticketmaster.com.