In 'Happy Days', in which city is the show set?

Which series follows cab drivers at the Sunshine Cab Company? In 'The Mary Tyler Moore Show', in which city does Mary Richards work? In 'Laverne & Shirley', in which city do the two women work at a brewery? In 'WKRP in Cincinnati', what kind of business is WKRP? In 'Cheers', what is the name of the know-it-all mail carrier? In 'Cheers', which regular's entrance is greeted by everyone shouting his name? In 'Frasier', what is the name of the Crane family's dog? In 'Frasier', what is the name of Frasier's radio producer?