Spanish in Miami

My girlfriend and I just took a daytrip to Miami. I was very impressed with the number of people there who speak Spanish, including non-Hispanics. Several times, someone came up to us, assumed we spoke Spanish and just started talking. I responded as best I could, but soon lamented the fact that I get very little practice with 'real live' Spanish, and especially with such a variety. In just one location (around Coral Gables, if you must know) I heard 3 or 4 distinct accents. If I could live in a location like that, my Spanish would be vastly improved in no time. If you ever get a chance to go there, have your Spanish handy and prepare to have it tested!