Another Round 2020

A history teacher, a psychology teacher, a music teacher, and a physical education teacher gather at a restaurant to celebrate one of their 40th birthdays. They decide to test the scientific theory that from the moment of birth, people suffer from a lack of alcohol in their blood, and that to be truly happy, one needs to be a little tipsy. The friends agree to observe how drinking will affect their work and personal lives, and they set some rules: no drinking in the evenings or on weekends. It would seem, what could possibly go wrong?