The fictional bar that forms the setting for a series of science-fiction stories by Spider Robinson. A place for celebration, mutual support, group mental calisthenics, and some of the worst puns this side of the Rio Grande. The fundamental operating principle of Callahan's Place is: "Shared pain is lessened; shared joy is increased. Thus do we refute entropy." You can find on-line incarnations of Callahan's on Usenet and IRC (Undernet).