Blackjack varies across countries and regions in several ways, primarily due to differences in local rules, payouts, and cultural preferences. The most noticeable variations include the number of decks used, whether dealers must stand or hit on a soft 17, and how specific actions like splitting or doubling down are handled. Some casinos offer different payout structures for Blackjacks, with regions like the US sometimes offering lower payouts like 6:5 instead of the standard 3:2, which increases the house edge. Additionally, side bets such as Perfect Pair or 21+3 are common in some regions, adding extra layers of variation. Cultural factors also influence the atmosphere of the game, with European casinos often emphasizing formality and socializing, while American casinos may prioritize faster-paced, individual play. The popularity and style of Blackjack can also differ; for example, in Macau or the Philippines, unique game variants and high-stakes settings cater to local tastes. These regional differences, combined with varying house rules, can shape the overall Blackjack experience, requiring players to adapt their strategies based on where they are playing.