Do bars refrigerate their beer kegs?

No, bars do not typically refrigerate their beer kegs. Instead, they use a system called glycol cooling to keep the beer cold. Glycol is a type of alcohol that has a lower freezing point than water, so it won't freeze even at cold temperatures. Bars circulate chilled glycol through coils that are wrapped around the beer kegs, which keeps the beer cold without having to refrigerate the entire keg. This system is more efficient and can also be used to control the temperature of different types of beer, as some beers taste best at slightly different temperatures.