Not many bands can consistently perform great live shows after great live shows like O.A.R. (Of A Revolution). Formed more than a decade ago when most of the members were still in high school, the band still attracts a large crowd to its performances. The jam band made a stop at Time Warner Cable Amphitheatre at Tower City Saturday night to a slew of new fans as well as old loyal fans, who have followed the band since it released its first CD, "The Wanderer." The down-to-earth group played a mix of old and new hits, including the always popular and upbeat "Crazy Game of Poker," and newbies "Shattered" and "This Town." O.A.R. co-founder and singer Marc Roberge makes it a point at every concert to warn fans not to get too crazy moshing and pushing other people. He did so Saturday night to the Cleveland crowd. The highlight of the evening was O.A.R. surprising the crowd with Joe Cocker's rendition of "With A Little Help From My Friends," (aka The Wonder Years theme song). The two-hour long, high energy concert ended with opening act Latin funksters, Ozomatli, sharing the stage with the headlining act.