I think depends on the casino and the location. In some parts of the world, such as Europe and Canada, single-zero roulette is the standard and most popular version. In other parts of the world, such as the United States, double-zero roulette is more common. However, many experienced players prefer the single-zero version as it offers slightly better odds. Ultimately, the choice of roulette game comes down to personal preference and the availability of games at the casino.