The what-ifs are haunting. They say you have a beautiful voice. That you can dance. That you're really funny. Are you truly an undiscovered star? Whether it's music, dance, theater, or comedy, get over the stage fright and test your material before a live audience. Miami is not, for sure, New York, but at least we have Luna Star's open mike twice a month (every second and fourth Saturday, beginning at 8:00 p.m.). "It's a free-for-all. Music, poetry, comedy. You can do whatever you want," says owner Alexis Sanfield. It's also first come, first served. Put your name on the list early -- because roughly seven to nine performers get a shot each night. Good news for newbies: The audience is very supportive. No boo birds at Luna. And even if you bomb, you can drown your sorrows in one of Luna's 100 beers. Prices range from $3 bottles of Rolling Rock to a Belgian for $17.