In this episode, Zach tells Luke that it's obvious Luke used to play baseball. Scott Patterson, the actor who plays Luke, actually did play minor league baseball for eight years before pursuing an acting career.
The show tune Emily puts on in the car is "Oh, What a Beautiful Mornin'" from the musical "Oklahoma!". The plot of the musical has subtle similarities to the Gilmore Girls. The story revolves around a woman, Laurey, who has to decide between two men (similar to Lorelai deciding between Luke and Christopher). The musical also features a fund-raising auction where the ladies make lunch baskets for the men to bid on to win the company of the lady for lunch (a so-called "box social"). The same kind of auction was featured in the episode "A-Tisket, A-Tasket" (Season 2, episode 13), where Jess out-bid Dean for Rory's lunch basket.