There’s a reason why the folks making that new prime-time ABC soap about our fair city went to the Bluebird Cafe to film a performance scene; it’s not only the sounds, but the one-of-a-kind spaces that make Nashville what it is. And it’s no exaggeration to say the Bluebird is an institution that embodies one of Music City’s core values: the song that can stand on its own. For 30 years, it’s been the quintessential listening room, the sort of place where doing anything to distract from a songwriter who’s taking her turn in the round is enough to get you shushed. In other words, an excellent place to really listen. The renowned Green Hills venue is celebrating its anniversary with a show featuring the first performer who ever played there, saxman Jay Patten, his jazzy band and guests including Cowboy Jack Clement, Gail Davies, Jimmy Hall, David Olney, Jonell Mosser, Crystal Gayle and Kathy Mattea, who helped put the Bluebird on the map early on.