The Post reached out to Madison Avenue’s best and brightest and asked them for out-of-the-box ideas to raise revenue for the city’s mass transit system. The panel, which included Dennis Roche, president of Zoom Media, which operates a network of digital screens in gyms, bowling alleys and restaurants, Dave Etherington, global marketing officer for Titan Worldwide, an outdoor advertising company, and Hank Wasiak and Griffin Stenger of New York ad agency The Concept Farm.