Four tickets to the Denver Art Museum's Psychedelic Experience: Rock Posters from the San Francisco Bay Area, 1965-71.  Take a trip to the era of 60’s rock through 300 posters and the music, art, and culture that inspired their experimental design. They’re all there—the Grateful Dead, Big Brother and the Holding Company, and The Velvet Underground, plus video, music, and activities that will transport you to Haight-Ashbury. The show runs through July 19, 2009.