Name one common cocktail that includes rum.

The Daiquiri is a classic cocktail that prominently features rum as its main spirit. Traditionally, it is made with white rum, fresh lime juice, and simple syrup, which creates a refreshing and balanced drink. This cocktail is a staple in bars and is known for its simplicity and the ability to showcase the flavor of the rum used, making it a favorite among rum enthusiasts.

In contrast, the Margarita primarily utilizes tequila as its base spirit, the Mai Tai is a rum-based cocktail but is less universally recognized than the Daiquiri, and the Bloody Mary relies on vodka as its primary ingredient. Thus, the Daiquiri is a quintessential rum cocktail, making it a correct answer for this question.