All five are related or well known to each other.
The casino dealer was a 45-year-old Yeo Eng Seng in 2012.
He hatched a plan to cheat the casino in baccarat after finding out from an ex-dealer that he could do so if he memorised the card sequences and relayed them to the other players.
Yeo roped in 44-year-old Ho Keng Guan and 40-year-old Lee Mee Leng – who are husband and wife - to help with the scheme, which was executed in April and May this year.
Subsequently, they asked Ho's brother-in-law, 42-year-old Lim Boon Kwang, and close friend 51-year-old Leow Pui Kee, to join the scam.
For their offences, Yeo and Ho were given jail terms of 22 months each.
Lee was sentenced to 14 months' imprisonment, while Lim and Leow were each given a six-month jail term.
In mitigation, the court heard that Yeo had a gambling addiction and owed money to credit card companies.
Ho and Lee were gamblers and the court was told Lee suffers from health problems.
The court noted that Lim and Leow were not as culpable.
All five have also made full restitution.
Lim and Leow are appealing against their sentences.