Bon Jovi and Clive Davis came out to celebrate influential concert promoter Ron Delsener at the premiere of the documentary Ron Delsener Presents at the Tribeca Film Festival in New York City Sunday. The film, d irected by Jake Sumner, follows the decades-long career of Delsener, who worked with some of the biggest names in music, including The Beatles, David Bowie, Bob Dylan, and Billy Joel, to name a few. We had the honor of speaking with the almost 87-year-old about his memories with David Bowie and asked his secrets for still going strong.