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Comically, this episode reveals that Cafe Nervosa is named for a person, the owner Maureen Nervosa, rather than being a coffee-related reference.
After bidding Cafe Nervosa farewell ("Three days and five coffee shops later"), the café used as the setting for the next scene is "Seattle Coffee Works," one of Seattle's best known cafés, located on Pike & 1st.
When Julia meets Niles for the first time, she says to Frasier, "Who is this, your stunt double?" David Hyde Pierce originally auditioned to be Kelsey Grammer's double on the show, but they decided to add the role of Niles because of the familial resemblance.
Frasier calls Ben "young man" -- but Elvis Costello is actually six months older than Kelsey Grammer.
Avery (John Hannah) comments that Frasier spent $9,000 on caviar the previous month, clearly referencing Episode 10.18 "Roe to Perdition" (2003), which aired two weeks earlier. In that episode, Frasier had started buying lots of top-quality caviar from an inside source for himself and Seattle's elite crowd.
John Hannah plays an accountant named Avery McManus, and Elvis Costello plays a musician named Ben. Elvis Costello's real last name is MacManus.