In 'The Simpsons', what is the name of the town where the family lives?

In which city is 'Cheers' set? In 'Cheers', what is the name of the bar owner played by Ted Danson? In which city is 'Frasier' set? What is the name of Frasier's brother in 'Frasier'? Who created 'The Simpsons'? Where does Homer Simpson work? What is the name of the bar Homer frequents in 'The Simpsons'? Who owns the Kwik-E-Mart in 'The Simpsons'?