The ghost at Farnsby's house asks if the actor from Bedtime for Bonzo (1951) really became president. She's referring to Ronald Reagan who co-starred in the film, alongside a chimp.
There is a picture of an upside down pineapple at the Farnsby's house. This is a well known swinger signal.
Pickleball is a real game played in the US, using miniature tennis racket and a plastic ball will holes in. Essentially one of the cheap sets for playing tennis on beach holidays.