On the back of the desert bunker entrance to the Guild of Calamitous Intent's nightclub anti-war graffiti, including "Peace" and anti-war symbols is visible. This artwork is nearly identical to the graffiti on the Brotherhood of Steel desert bunker in Fallout: New Vegas (2010).
Don Hell's is a parody of Don Hill's, a famous nightclub show creators Chris McCulloch and Doc Hammer used to go to.
When it's revealed that Vendata the robot was made in 1976 Shore Leave quips that he's Bicentennial Man, a reference to the Robin Williams movie of the same name where he plays a Robot