The Society for Cinema and Media Studies has a conference in 2013 in Chicago March 6-10 and in 2014 in Seattle and an Urban Studies Scholarly Interest Group [sign up here].
The Association for American Geographers has the next conference April 9 to 13 2013 in Los Angeles (and of course features numerous sessions on cities], and is actively promoting connections with the humanities–see this book and also this one.
There’s the Modern Language Association, which features a growing number of scholars interested in cities and spatial theory (even if still largely devoted to more traditional approaches), with the next conference in Boston, Jan 3-6, 2013.
Also the Cultural Studies Association, which has a new journal launched in 2012 named Lateral (2012 conference starts tomorrow March 28, no dates posted for 2013).
Finally the Urban History Association, currently featuring a call for conference papers on THE COSMOPOLITAN METROPOLIS (Columbia University; New York City October 26-28, 2012).