A field study in an everyday setting with a $21$ between$-$subjects design was conducted to test the hypotheses. The independent variable in this study was the version of a music program $($prosocial vs$.$ neutral songs$)$ that was played in a caf$.$ The data were collected by three observers via standardized observation. The observers were trained and used a codebook for the observation process. They were instructed to code the actions of every guest inside the caf$$ who was exposed to the music. For each guest, the observers coded estimated age, whether the guest was seated in a group or alone, and the food and drink orders placed. Additionally, the observers recorded the amount of tip the guests gave to the server and the sum of the bill they had to pay. The experiment was conducted over eight days in June $2015.$ During the first week $($Friday$$Monday$),$ the prosocial music playlist was played on Friday and Sunday, and the neutral music playlist was played on Saturday and Monday. During the second week, the sequence wa