A hostess KTV nightclub, often referred to simply as a hostess club or a KTV lounge, is a type of establishment that combines elements of a karaoke bar, nightclub, and entertainment venue. In these establishments, patrons typically rent private rooms equipped with karaoke machines, where they can sing along to songs with friends or hostesses.

What distinguishes a hostess KTV nightclub from a regular KTV nightclub is the presence of hostesses, who are female employees hired to provide company, conversation, and entertainment to customers. These hostesses often sit with patrons in their private rooms, engage in conversation, pour drinks, and sometimes participate in karaoke singing as well.

The nature of interaction between hostesses and patrons can vary depending on cultural norms and the specific establishment. In some cases, hostesses may provide more intimate or flirtatious companionship, while in others, their role may be primarily social and conversational.