A piano bar consists of a piano or electronic keyboard played by a professional musician. Piano bars can be located in a cocktail lounge, bar, hotel lobby, office building lobby, restaurant, or on a cruise ship. Usually the pianist receives a small salary plus tips in a jar or basket on or near the piano, especially from patrons requesting a song traditionally written on a beverage napkin. Some piano bars feature a baby grand or grand piano surrounded by stools for patrons. Others have a bar surrounding the piano or keyboard.

A bar, also known as a saloon, a tavern or tippling house, or sometimes as a pub or club, is an establishment retail business that serves alcoholic beverages, such as beer, wine, liquor, cocktails, and other beverages such as mineral water and soft drinks. Bars often also sell snack foods, such as crisps or peanuts, for consumption on their premises. Some types of bars, such as pubs, may also serve food from a restaurant menu. The term "bar" refers to the countertop where drinks are prepared and served, and by extension to the overall premises.