Simplify the following text for a Grade 10 native English-speaking person.
Original: The Red Hot Chili Peppers was formed by Anthony Kiedis , Hillel Slovak , Flea , and Jack Irons while they attended Fairfax High School in Los Angeles , U.S.A. Originally under the moniker of Tony Flow & the Miraculously Majestic Masters of Mayhem , their first performance was at the Rhythm Lounge to a crowd of approximately thirty people , opening for Gary and Neighbor 's Voices .
Simplified: Red Hot Chili Peppers were originally called Tony Flow and the Miraculously Majestic Masters of Mayhem .