Students' association from the Dutch city of Leiden. Gathering point for the metalheads, punks, pagans, goths and everyone else who is non-mainstream or just weird among the student-body. Members are known to be at least slightly nuts if not outright bumfuck crazy and have a habit of doing things just for the heck of it or because they CAN. They also seldom take themselves seriously.

The bar prides itself with the widest selection of fine beers of all the students' associations of Leiden and they actually serve good whisky and mead. No real requirment to become a member except for being a student and possessing both a good sense of humor and an open mind.
Random Posh student 1: Who's the idiot with the fire-poi and the kilt.
Random posh student 2: He's most likely a member of Catena
by Desjima October 21, 2011
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