Name three subjects that a bartender should never discuss with customers.

The choice highlighting politics, religion, and social issues as subjects a bartender should avoid discussing with customers is based on the understanding that these topics can lead to heated debates, discomfort, or conflict in a public setting. Engaging in conversations about politics and religion often reveals divergent views that can polarize people. Social issues may evoke strong emotions and personal experiences, potentially making the environment awkward or tense.

By steering clear of these discussions, a bartender helps maintain a neutral and welcoming atmosphere for all patrons, ensuring that everyone feels comfortable and can enjoy their experience without the risk of contentious dialogues. The other options include various subjects, but they may not carry the same level of potential for argumentation or disagreement as the selected answer.