Take your friends along and form a team consisting of 4 members. Don't worry, there will probably be enough people around to form teams, even if you come alone.
The objective for the teams is to finish their drinks before the opposing team. Drinking is permitted once your team has hit the bottle in the middle of the field and knocked it over until the opposing team has readjusted the bottle and taken their places and yelled "Stop!"
Instructions for the game: https://www.youtube.com/watch?v=ESxRTomRBBM
The price for a 4-member team is 5 € for students and 8 € for non-students per team.
More information on Facebook: https://www.facebook.com/events/2107020685982731/ and registration opened here
. It is also possible to register on the spot.