Denver : I heard news that Carbone's Italian Deli on 38th closed.  Maybe in 2013?  As I grew up east coast, a good sub was vital and Colorado lacks this but Carbone's was the real deal, was where I went as much as possible.  I remember how engaging matriarch Rosa was to me and everyone waiting in line.  The joy of unwrapping that white butcher paper and enjoying the heavenly sandwich ❤️