Far removed from the rest of the nation, South Florida has always had difficulty attracting major musical acts in every genre, but these days the folks who play folk seem to flock here. At Homestead's Main Street Café, each Thursday is folk night. For the past year the eatery's Up-Close and Personal Concert Series has presented a relaxed evening of new or traditional music featuring folkies from in and around the area, as well as national artists traveling on the circuit. For a reasonable cover charge ranging from $10 to $15 (really big acts command $25), you can take in the congenial setting and enjoy the likes of Melanie, Jack Williams, Janis Ian, Annie Wenz, Roger Sprung, and Hal Wylie. Who would have guessed a short journey south could pack such ear-pleasing benefits.