There are many different ways of communicating science to the public. Science slams and other similar competitions can be an entertaining way of engaging an audience.
Science Slam is a science communication format where scientists explain their research projects in short 10-minute-talks that are easy to follow and afterwards the audience gets to vote. The important thing is not primarily the scientific outcome of their work, but to explain it in an understandable, entertaining and concise way. Science Slams take place outside the university or lecture halls and instead in cultural centers, theaters or clubs, usually in the evening. The format was invented and developed in germany in 2016. See http://www.scienceslam.de/english.html
Science Slams and Science Communication Competitions in and near Bremen
The following list provides examples, it is not necessarily complete.