Part of the plan involves Ezri leaving the tray (which is Odo in disguise) with the spiked drink in the countroom. But waitresses never leave the tray behind at a table! They should have had Odo become the martini glass, since that had to remain in the room.
Vic's Las Vegas program was never malfunctioning, it just has a jack-in-box within it, but O'Brien's commands were still not obeyed.
Trill spots go all the way down to their feet, but you can't see any on Ezri's legs.
Kassidy: I know that Vic's isn't a totally accurate representation of how things were. But it isn't meant to be. It shows us the way things could have been. The way they should have been.
Sisko: We cannot ignore the truth about the past.
Kassidy: Going to Vic's isn't going to make us forget who we are or where we came from. What it does is remind us that we are no longer bound by any limitations, except the ones we impose on ourselves.
O'Brien: Robbing casinos isn't part of any Starfleet job description I've ever read.
Vic: There's got to be a way for us to bury the hatchet.
Frankie: I already did. In your head.
Cicci: You call this a cheesesteak? I wouldn't feed this to my parole officer!
Bashir: Miles, are you thinking what I'm thinking?
O'Brien: That depends on what you're thinking.
Bashir: You need to get some rest. Maybe take a little vacation.
Vic: A vacation? Did you guys take a vacation when the Dominion took over DS9?
Bashir: It's not the same thing...
Vic: It is to me. This is my life, remember? I don't run at the first sign of trouble.
Avery Brooks (Sisko) and James Darren (Vic Fontane) sing "The Best is Yet to Come" as a duet at the end of the episode.
Cirroc Lofton (Jake Sisko) does not appear in this episode.
Bobby Reilly, who plays the countman is actually Robert O'Reilly, who normally plays Gowron. Like J.G. Hertzler in "Chimera", he is credited under a slightly different name when playing a different character than the one he's best known for.
Bashir: Vodka martini, stirred, not shaken.
This is a sideways nod to another popular movie series beginning in the sixties centered on the super spy James Bond, who is parodied in another Deep Space Nine episode, "Our Man Bashir". Bond always ordered his martini shaken, not stirred.
Badda Bing, Badda Bang
This is from the quote "Badda Bing, Badda Boom", a saying that roughly means "it's all taken care of". This quote was made famous by actor Bruce Willis in the 1997 film The Fifth Element.
This "feature" of the Vegas holosuite program is similar to a video game feature called an Easter Egg, an undocumented feature that is triggered by a particular, and often complicated, sequence of game actions.
Some easter eggs provide access to undocumented game play; others do silly things like scroll the programmer's initials or trivial messages across the screen. Many game designers consider easter eggs of the latter sort unprofessional.
The casino caper used to "rescue" Vic from his rival is clearly intended as an homage to Ocean's 11 - not the recent one, of course, but the original Frank Sinatra one, even down to a scene with them marching off to the holosuite ready to "take on the mob".