Which of the following bar practices should be avoided?

Dunking the faucet directly into the beer while pouring is a practice that should be avoided due to the risk of contamination. This action can introduce bacteria or other pathogens from the outside of the faucet into the beer, which can lead to spoilage or off-flavors. Proper sanitation is critical in any bar or brewery setting to maintain the quality and safety of the beverages served. Using clean glasses for every pour ensures that each drink is served in a sanitary manner, rinsing glasses with water before pouring helps to prevent undesirable flavors, and serving beer with appropriate carbonation levels is essential for preserving the intended mouthfeel and taste profile of the beer. Maintaining proper hygiene and sanitation practices is crucial for delivering a quality product to customers.