Tonight is the slideshow presentation Fast Forward, during which participants will have just 20 slides, and 20 seconds per slide, to answer the question: What's next for Philadelphia? Curbed's Joe McNulty will present our answer, or at least our proposition that Philadelphia's next challenge—and opportunity—will be resolving the tension between top-down and bottom-up approaches to design. Tonight! 6-8 pm, Center for Architecture, 1218 Arch Street. Hope to see you there!