10 Tops Strut your stuff at monthly performance showcase. 10 Tops   Next: 9/24 , 7:30pm last-minute signups to perform; 8pm show starts;   Sacred Fools Theatre      660 N. Heliotrope Los Angeles, CA 90004 310-281-8337 The Sacred Fools Theater Company knows you're out there. Yes, all you shower singers, closeted stand-up comics, and even the guy who can play the entire Led Zeppelin catalogue on the ukulele. Here's your chance to get out there and sing, act or play your heart out at this monthly open-mike night. The only limitations are your imagination and a clock. On the last Monday of every month, 10 people get seven minutes to perform anything they want. Be sure to sign up early, though. This is Hollywood and you know there's more than enough folks who crave a minute or two in the spotlight. You can hit the theater's website or call to reserve your spot. Then all that's left to do is dry clean your shirt or tutu, write that last joke, get tickets for your whole fan club and have a ball. If you're too shy for the stage, it's just as fun from the safety of a seat in the audience. -- Tanya Ward Arts & Culture: Comedy, Performance art, Theater Phone Number: 310-281-8337