The croupier was part of a holoprogram when Vic's Lounge because of a jack-in-the-box was changed into a casino run by mobsters. Kira was playing blackjack, and trying to gain notice by Frankie Eyes as part of the plot to get Vic his lounge back. Frankie became interested in her, and when she lost at the table with sixteen, he ordered the croupier to give her another card which was a ten. He tossed it aside and told him to deal another card which was a face card, finally she was dealt a five for twenty one, and the croupier was ordered to pay her. He replied, "Yes, sir." (DS9: "Badda-Bing, Badda-Bang")
These Humans visited Vic's Lounge to see Vic singing and having a drink while Constable Odo first visited the program and then secretly quite some time shortly before he first kissed Kira. (DS9: "His Way")
The replacement accountant took over from the usual accountant in the casino formerly known as Vic's Lounge. In order to clear the room with the safe, Bashir slipped an ipecac Mickey Finn into a martini served to him by Ezri Dax. (DS9: "Badda-Bing, Badda-Bang")
The replacement accountant was played by Trek veteran Robert O'Reilly, who is better known for his role as Gowron. He was credited as "Bobby Reilly" to conceal the fact that it was the same person.
These five holographic band members were part of the Vic Fontaine holoprogram. They've worked for Vic on his appearances in the club. The band includes a drummer, a bass player, a piano player, a guitarist, and a saxophone player.
In 2374 the pianist was replaced by ConstableOdo who was supported by Vic in his attempts to understand the rules of love and flirting. (DS9: "His Way")