One of Broadway’s favorite real-life married couples, Mario Cantone and Jerry Dixon, bring their new show to Feinstein’s at the Nikko. How Long Has This Been Going On? promises to be a delicious evening of stories, songs, and of course, laughs. After all, the last time the duo worked together, they created Laugh Whore, Cantone’s wickedly entertaining and Tony Award-nominated solo show-turned-Showtime special.