With Friday the 13th falling this week, gamblers across the world will once again be checking their pockets for lucky charms, avoiding certain seats and, in some cases, refusing to place a bet at all. Gambling superstitions are among the oldest beliefs people hold about chance, and they have changed far less over the centuries than the games themselves.
In Ireland, where the “luck of the Irish” is woven into national folklore, these habits are as visible online as they are at the racecourse. Many players now choose where to play by reading Irish casino reviews, yet still keep a four-leaf clover in their wallet or log in only on a day that “feels lucky”. It is a reminder that some of humanity’s oldest instincts about fortune sit comfortably alongside modern technology.
Ancient Roots: Knucklebones, Gods and the Venus Throw
Long before six-sided dice, people gambled with astragali: the ankle bones of sheep and goats. Each bone could land on one of four distinct sides, and the pieces have been found at Egyptian, Greek and Roman sites, including in tombs and temples. That placement says a lot. For ancient players, a throw was not purely random; it could be a message from the gods.
In the Greco-Roman world, the best possible cast, with every bone landing on a different side, was known as the “Aphrodite” or “Venus” throw, while the worst was nicknamed “the dog”. The same bones were used for both games and fortune-telling, so the line between gambling and divination was thin. Even emperors were not immune: the Roman historian Suetonius records that Augustus was a passionate dice player.
Romans also prayed to Fortuna, the goddess of luck, whose turning wheel symbolised how quickly fortunes could rise and fall. The image survived the empire and still appears today in everything from medieval manuscripts to television game shows.
From Horseshoes to Four-Leaf Clovers: The Rise of Lucky Charms
As gambling spread through medieval and early modern Europe, so did the belief that objects could tilt the odds. Iron horseshoes were thought to ward off evil, and many people still hang them with the points upward so the luck “doesn’t run out”. In Ireland and Britain, the four-leaf clover became a prized token precisely because it is so rare, while the rabbit’s foot travelled into gambling culture through American folk traditions.
Card games, which reached Europe in the late fourteenth century, brought their own taboos. Players developed rules about which hand to deal with, where to sit, and whether a borrowed coin or a lent pound could bring bad luck to the lender. Many of these customs have no single recorded origin, but they have been handed down from table to table for generations.
The Numbers Game: Why 7, 8, 4 and 13 Matter
Numbers carry some of the strongest gambling superstitions of all. At the craps table, saying the word “seven” aloud while a player is trying to make their point is widely considered bad form, because rolling a seven ends their turn.
In Chinese culture, the number 8 is treasured because it sounds like the word for prosperity, while 4 is avoided because it sounds like the word for death. Casinos in Macau and beyond have long taken these beliefs into account in their design, from room numbers to table layouts. In Las Vegas, the MGM Grand’s original entrance, built to resemble a lion’s open mouth, was widely reported to have been redesigned in the late 1990s partly because some Asian visitors considered walking into a lion’s mouth unlucky.
Then there is 13. Many hotels and casino resorts still skip the 13th floor in their numbering, and Friday the 13th remains a day when some gamblers prefer to stay home, while others deliberately play to “beat” the curse.
Rituals at the Table: Blowing on Dice and Lucky Seats
Some gambling rituals are physical. Blowing on dice before a roll is one of the best-known, and sociologist James Henslin’s classic 1967 study of craps players found that many threw the dice softly when they wanted low numbers and hard when they wanted high ones, as if force could shape the outcome.
Others are about place and timing: a “hot” seat that has just produced a winner, a favourite slot machine, a lucky outfit or a refusal to count chips until the session is over. Wearing red, a colour linked to good fortune in Chinese tradition, is also common among players in many parts of the world.
Why Gambling Superstitions Persist: The Psychology of Luck
Psychologists have a name for much of this behaviour. In 1975, Harvard researcher Ellen Langer described the “illusion of control”: the tendency to believe we can influence outcomes that are actually determined by chance. Her experiments showed that people valued lottery tickets they had chosen themselves more highly than ones handed to them at random.
Other mental shortcuts play a part too. The gambler’s fallacy leads players to believe a result is “due” after a run of losses, and memory tends to favour the night a ritual seemed to work over the many nights it did not. Rituals can also calm nerves, giving players a sense of order in a situation that is, by definition, unpredictable.
Superstition in the Digital Age
Online casinos might seem like the end of superstition. Outcomes on licensed sites are generated by random number generators that are tested by independent laboratories, which means the time of day, the device used or a lucky charm on the desk has no effect on the result.
Yet the beliefs have simply moved online. Players talk about “hot” and “cold” slots, pick games with lucky numbers in their titles, or wait for a particular hour to log in. In Ireland, where the Gambling Regulatory Authority was set up under the Gambling Regulation Act 2024, the focus of regulation is on fair, licensed play and player protection, not luck, which is why checking a site’s licence matters far more than any ritual.
Harmless Fun, With Limits
For most people, gambling superstitions are a harmless part of the entertainment, a link to traditions that stretch back thousands of years. They become a problem only when they encourage someone to chase losses or bet more than they can afford in the belief that their luck is about to turn.
Setting a budget and a time limit before playing remains the most reliable “lucky charm” of all. Anyone in Ireland who feels their gambling is getting out of control can find free, confidential support through services such as Gamblers Anonymous Ireland and the HSE.
So if you find yourself tapping a horseshoe or avoiding seat 13 this Friday, you are in very old company. From Roman emperors rolling knucklebones to players scrolling through casino sites on their phones, the hope that luck can be coaxed onto our side is one of the most enduring stories in the history of gambling.