This program from the Mason Opera House for a 1920 performance of “The Mikado” has been listed on EBay, with bids starting at $5.50. The Mason was one of the leading theaters on Broadway. It was demolished in the 1950s to make way for a Cold War monstrosity that was in turn demolished after being damaged in the Northridge earthquake. After several years of being nothing but a big hole in the ground, the site is now undergoing construction for federal courthouse.
Which will look like this.
After the show, stop in at the Pig and Whistle at 224 S. Broadway, now the site of The Times parking structure.