Because he liked Grandmaster Flash, he often went to a club called The Eve After Dark to see a lot of DJs and rappers performing live. He then became a DJ in the club, at first under the name "Dr. J", his favourite basketball player. At the club, he met DJ Yella for the first time. Soon afterwards he started using the name "Dr. Dre", half his old nickname, and half his first name, also calling himself as the "Master of Mixology". He later joined the musical group World Class Wreckin' Cru in 1984. The group would become stars of the electro-hop scene that was really popular in early 1980s West Coast hip hop, and their first hit "Surgery" would feature Dr. Dre on the turntables and sell 50,000 tapes within Compton. Dr. Dre and DJ Yella also did mixes for local radio stations, making the ratings for it's show "Afternoon Traffic Jam" go higher. Dr. Dre's earliest songs were released in 1994 on a CD called "Concrete Roots". 