For our 50 Best Bets During the Democratic National Convention, visit our DNC Calendar page. Art: Jules Feiffer Political cartoons, illustrations, drawings, and prints from the Pulitzer Prize-winning cartoonist. Michele Mosko Fine Art, 136 W. 12th Ave., www.michelemoskofineart.com. 11 a.m.-6 p.m. Through Aug. 31. Music: Rock the Bells Concert The international hip-hop festival comes to Denver with performances from A Tribe Called Quest, Nas, Mos Def, Method Man, and more. Fiddler's Green Amphitheatre, 6350 Greenwood Plaza Blvd., Englewood, www.guerillaunion.com. Noon. Music: 1964--The Tribute The top Beatles revival show. Red Rocks Amphitheatre, 18300 W. Alameda Pkwy., www.redrocksonline.com. 8 p.m. Party: Barack the Night Away Sutra's convention kick-off party. Sutra Nightclub and Lounge, 1109 Lincoln St., www.sutradenver.com. 8 p.m.-2 a.m.