Complex sentence: On the frivolous side, there was also a "secret society" called "hypotenuse" society, which was primarily oriented around marathon-drinking; registering every shot of punch as a "working" in the meeting minutes.
Split into simpler sentences: On the frivolous side, there was also a "secret society" called the "Hypotenuse Society," which was primarily oriented around marathon drinking. Every shot of punch was registered as a "working" in the meeting minutes.