In 'ER', in which city is the hospital located?

In 'The Golden Girls', in which city do the four women live? In 'Sex and the City', what is Carrie Bradshaw's job? Who played Carrie Bradshaw in 'Sex and the City'? In 'Grey's Anatomy', in which city is the hospital located? In 'House', what is Dr. Gregory House's medical specialty? Who played Dr. Gregory House in 'House'? Which TV network originally aired 'Friends'? Which TV network originally aired 'Seinfeld'?