The gag about not getting the Sean Connery Bond films. In Real Life, the popularity of the Bond films led to Connery doing a famous series of ads for Suntory. Given that Sofia Coppola's dad was also part of that series of ads, this was most likely intentional.
Downplayed but present. Bill Murray's character is seen playing miniature golf, but deliberately does not channel his character in Caddyshack ("Be the ball, be the ball...It's in the hole!") Murray and his brothers are all avid golfers in real life, and even host an annual charity outing.
Dawson Casting: Inverted. Scarlett had just turned 18 and finished high school at the time of shooting, playing a college graduate in her early twenties.
Defictionalization: Suntory started using the Catch-Phrase from the fictional Suntory ads in actual Suntory ads run in the United States (which also led Suntory to attempt an expansion of their distribution in America).