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Longman Dictionary of Contemporary English
concession stand
noun
EXAMPLES FROM CORPUS
▪ He was bothering the girl at the concession stand before, so she had the usher call us.
▪ Looking for a concession stand, he turned a corner.
▪ One struck and killed a young man standing near a concession stand.
Wikipedia
Concession stand

A concession stand ( American English), snack kiosk or snack bar ( British English, Irish English) is a place where patrons can purchase snacks or food at a cinema, amusement park, fair, stadium, or other entertainment venue. Some events or venues contract out the right to sell food to third parties. Those contracts are often referred to as a concession — hence the name for a stand where food is sold. Usually prices for goods at concession stands are greater than elsewhere for the convenience of being close to an attraction, with outside food and drink being prohibited, and they often contribute significant revenue to the venue operator (especially in the case of movie theatres).