In 'Cheers', what is the name of the bar owner played by Ted Danson?

Which 'Seinfeld' character is Jerry's nemesis and a mail carrier? Who co-created 'Seinfeld' with Jerry Seinfeld? Who played Elaine Benes in 'Seinfeld'? In which city is 'Cheers' set? In which city is 'Frasier' set? What is the name of Frasier's brother in 'Frasier'? In 'The Simpsons', what is the name of the town where the family lives? Who created 'The Simpsons'?