Players can agree on house rules before starting a blackjack game. While each casino has standard rules, players at private games or less formal settings often discuss and establish specific rules they want to follow, such as variations in betting limits, splitting, doubling down, and payouts for blackjacks. Agreeing on rules beforehand helps ensure that everyone is on the same page and can enhance the overall gaming experience. Clear communication about these rules can help prevent misunderstandings during the game.