The chains are on the prowl, and they're everywhere. Although the good old-fashioned independent coffeehouses never had too strong a presence down here in Miami to begin with, they are on the verge of extinction today. Which is why now more than ever it's important to support your local java shop. Our choice: Luna Star, because it stands for everything a coffeehouse should be and everything Starbucks is not. Instead of browsing through grossly overpriced material goods -- coffee mugs for ten dollars? Please! -- you can immerse yourself in the ambiance of a real coffee shop and maybe browse through a book. It also means you get live folky music on weekend nights, plus a subdued wooden interior conducive to reading, writing, and possibly contemplating the universe, not espresso-cup coasters. Beer and healthy hippie food are available, and to make the atmosphere complete, the Museum of Contemporary Art is just down the street. But maybe you just want to sit and have a cup of coffee; there's plenty of that too, any way you want it.