On Norwegian Cruise Line (NCL), Category M4 refers to a Family Club Balcony Suite (formerly known as a Family Mini-Suite). These cabins are specifically designed for families, typically accommodating up to four guests with two lower beds that can convert into a queen-size bed, along with additional bedding like a sofa bed or a pullman. A defining feature of the M4 category is the enhanced bathroom, which usually includes a larger, spa-like shower with multiple body spray jets or a bathtub, providing more room for bathing children. Guests in this category also enjoy "Club" perks, such as the ability to pre-book dining and entertainment further in advance and a complimentary bottle of sparkling wine upon embarkation, making it a "step up" from a standard balcony room.