Transported Man trick.
Vincent goes out to dinner with one of his coworkers and later returns on a date with Irene that gets interrupted by a police raid.
Don and Betty talk to Jim Hobart during the intermission of Fiorello! in episode 1x09 "Shoot".
Interiors of the casino were filmed in the lobby of the theatre.
From episode 1x16 "The Prophecy".
Kermit gives a speech on the staircase of the Los Angeles Theatre lobby.
The lobby of the Los Angeles Theatre was turned into a futuristic casino for In Time.
Source: Los Angeles Times