The exterior shots of the hospital were actually Fenster Hall at the New Jersey Institute of Technology. NJIT was also used for the interior of the hospital lunch area.

For interior shots in the hospital, the same set Scrubs is filmed on was used.

Tony: It's a death sentence. You're a Smurf for 10-15 years and then you die, shitting in your pajamas.

Vito: He Marvin Gayed his own nephew. The boss of the family.

Marvin Gaye was a soul singer who was shot murdered by his own father, Marvin Gay, Sr. on April 1st 1984 after a heated argument.

Tony being admitted to the 7th floor of the hotel during the dream sequence is a reference to he seven levels of Purgatory in Dante's Purgatorio. This reference is further seen when Tony falls in the stairwell and lands on the 5th floor, which, in the book, is where the greedy are banished.

Episode Title: Join the Club

The episode title, and the episode itself, are a continuation of the previous episode, "Members Only."

While at the hospital, Carmela tells Tony she regrets saying he'll go to hell when he dies. This occurred in "The Sopranos."

During the episode, Lee wonders aloud how Tony went from selling patio furniture to precision optics. In "College," Tony claims that he's in the patio furniture sales business.

Vito's comment about Eugene's suicide that "maybe he was a homo and there was no one he could talk to about it, it happens too" foreshadows the reveal in "Live Free or Die" that Vito himself has been living a secret gay lifestyle.