Over the years, various Madison neighborhoods have been described as ?troubled,? but the adjective has usually been applied to low-income and transient residential areas. Troubled, of course, is a catch-all descriptor for places where bad things are repeatedly happening, and this year we have the ?troubled? 600 block of University Avenue. University is a heavily traveled urban thoroughfare, and the block in question has student bars sprinkled on one side and the upscale Fluno Center ? an executive education building that is part of the University of Wisconsin?s School of Business ? dominating the other.