Fred calls Mr. Phillips "Mr. Magnesia," a reference to Phillips' Milk of Magnesia, an over the counter antacid and laxative.
Fred makes a reference to Vic Tanny. The Vic Tanny Gyms were a thriving business in the 1950s and '60s, being inviting health clubs for average people as opposed to those servicing only dedicated bodybuilders.
The well-known, successful jazz singer, Bill Henderson, plays the part of Harvey, the security guard.
Fred tells Mr. Phillips his age is "upper 50s", only for Mr. Phillips to look at him skeptically and guess his age to be 67. Redd Foxx was actually only 53 when this episode was shot.