[4] Members join for a variety of reasons, including a commitment to eating vegetarian or vegan food, cost, political or religious beliefs, and a lively social community.
[5][6] The building is officially a university-owned dormitory subject to university housing restrictions and fees,[2] but most members of the club choose to live in 2D in order to participate in the dining co-op.
[8] Peter Singer, a noted controversial philosopher at Princeton in favour of animal rights, was invited to eat at 2D on two occasions.
[12] Josue Lajeunesse, former custodian at 2D (currently custodian at Whitman College, Princeton University), was one of the main subjects of the documentary film The Philosopher Kings, and is an active humanitarian working to make clean water accessible to his village of Lasource, Haiti.
Although the author was not a member of the co-op, 2D figures prominently in the mystery/thriller novel The Muse Asylum by David Czuchlewski.