The University requires student groups to use approved bartenders and security to help minimize risk for student hosts, who might otherwise feel pressure to make difficult decisions serving alcohol to their peers. Bartenders work alone or in pairs, and security generally work in pairs as a professional standard. These professionals issue wristbands at the doors and ensure that best practices are followed in serving alcohol at the bar. As a show of its commitment to student safety, Penn will pay for the cost of bartenders and security for up to four events per semester, per student group .