You can play in a casino at 18 in some countries, as the legal gambling age varies globally. It is crucial to verify the age restrictions and regulations in your specific location before attempting to gamble. Many jurisdictions set the legal gambling age at 18 for various types of gambling activities, including casino games. However, some regions require individuals to be at least 21 years old to enter a casino and participate in gambling. Always ensure you comply with the local laws and regulations regarding the minimum gambling age to avoid legal consequences.