A bus bench ad for Joann Lenox Realty (Jane Krakowski from Season One's "A Classic New York Character") is glimpsed in the episode.
The opera scenes in this episode were filmed at the Kings Theatre in the Flatbush neighborhood of Brooklyn. Built in 1929 as a "movie palace" (the Loew's Kings Theatre--the name comes from the fact that Brooklyn is in Kings County, New York), it closed as a cinema in the 1970s and fell into severe disrepair until a renovation in the 2010s restored it to its former glory. Now a frequent concert and other performance venue, it is also a popular filming location for New York-based TV and movie shoots.
Casting Corey Mach as an obnoxious theatergoer who repeatedly and flagrantly interrupts multiple performances is ironic, given that Mach is well-known for his many stage appearances. He has appeared on Broadway in such musicals as Godspell, Hands on a Hardbody, Kinky Boots, and Merrily We Roll Along, and in the touring companies of Wicked, Flashdance, and & Juliet.