Do a little dance, make a little art, get down with appetizers -- it works for Tu Tu Tango. The concept, with tapas from around the world served in a bohemian setting designed to reflect an artist's garret, proved so popular that chairman and founder Bradley Weiser went ahead with plans to expand nationally. Currently the café, launched in 1991, has five successful locations, with two in Miami-Dade, one in Atlanta, one in Orlando, and another in Anaheim, California. Several more are scheduled to open in 1999 in diverse areas like Kansas City, Missouri; and Columbus, Ohio. So far the fare round here has remained consistently good, and the theme, "food for the starving artist" (hence the small portions), is carried out in live entertainment: Local artists are employed to draw, paint, or sculpt on the premises in exchange for eats. The resulting art is displayed in the restaurant until some art-hungry diner purchases it along with some Cajun chicken egg rolls, Mediterranean spinach dip, and an order of hurricane shrimp.