One World Cafe was created in 2003.
On Stage at World Cafe Live was created on 2005-12-15.
One Morning Cafe was created on 2007-04-09.
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An Cafe was created in 2003.
You only have one chef in Cafe World: the character that you create. You can have up to seven servers, which you can assign the position to by choosing one of your friends. (NOTE: That friend does not have to play Cafe World to be a server.)
There isn't a "number one" player in Cafe World, but Zynga's online forms often hold contests and such that only major players are capable of winning.
Cafe Carolina was created in 1984.
Cafe Cuts was created in 2006.
Vesuvio Cafe was created in 1948.
Crocodile Cafe was created in 1991.
Ariston Cafe was created in 1935.
The Lunatic Cafe was created in 1996.