Steve Martin famously said that talking about music is like dancing about architecture; tonight at the Hammer, audiences finally get to see that idea (almost) in action, as unpredictable architect Frank Gehry has it out with Bard College president and renowned classical-music scholar/conductor Leon Botstein, who commissioned Gehry to design Bard's performing-arts center in 1996. Expect an entertaining chat about the progressive relationship between architects and cultural institutions, how to deal with large-room acoustics, and what they really think of the new LACMA down the street.