This is Switzerlands largest beachparty! It takes place tonight,[masked], from 21h onwards.
You can directly reach Richterswil in circra 20/25 minutes from Zürich via S2 train. Trains go back all through the night.
We gather 21h at the entry of the beach party. It's directly next to the train station at the lake. Weather will be just awesome.
Party ticket includes train ticket back, including night fee. Free entry for people above 30.
More info here:
*Very spontaneous, I know ;-)*