Ann Althouse has an excellent post on public restrooms and gender/transgender discrimination here. Analyzing a New York appellate court's ruling aginst a transgendered plaintiff (Hispanic Aids Forum v. Estate of Joseph Bruno), which upheld the landlord's position that "If you're biologically a man, if you're born a man, then you use the men's room," Althouse notes that "This is denying people the right to chose which sex to identify with when they choose whether to use the men's or the women's room." In an update, she also notes a later amendment to the City law (a similar law was rejected on the State level) defining gender to include "a person's gender identity, self-image, appearance, behavior or expression, whether or not that gender identity, self-image, appearance, behavior or expression is different from that traditionally associated with the legal sex assigned to that person at birth.”
Read the whole thing at the link.