Loyalty programs in bars are being studied to see how effective they are in attracting customers. The researchers looked at how satisfied customers were with the service in bars that offered loyalty programs. They found that the most important factor for customers choosing a bar was the courtesy of the waiters, while loyalty programs were less important. Many customers were not aware of the loyalty programs, suggesting poor communication between bars and customers. The study also showed that well-educated waiters are important for a successful loyalty program in bars.