Miami has the largest Creole speaking population in the United States, numbering over 300,000. Creole is one of three official languages of the City of Miami - along with English and Spanish - so a lot of public signage, like at bus stations, is in all three languages, and all PRs, for example, are issued in Creole (or Kreyol as it is also spelled).

Miami has two Creole radio stations and the only Creole-langauge television network in the United States, with local news and programing in Creole and French. Creole is a very important language in the city.

Even local government websites are published in Creole:
http://www.mdpls.org/info/publicatio...guide_serv.asp

Portuguese, French, and German because for two reasons: they are the three next most widely spoken languages in the city (Portuguese especially is very widely spoken) and there is a lot of traffic passing through from Brazil, Germany, Canada, and France.