In the early days of hip hop, there were break dance crews who went around challenging each other. Many of these participants were former gang members who found a new activity. Bambataa's Universal Zulu Nation was one such group. As the scene grew, block parties became popular. It was interesting to note that the music being played during these gigs was stuff not being played on radio. Here James Brown, Sly & Family Stone, Gil Scott Heron and even the Last Poets found a home. Hence a younger generation began building off a musical tradition abandoned by its elders. Break beats picked up in popularity as emcees sought to rap longer at these parties. It wasn't long before rappers became the ONLY vocal feature at these parties. A microphone and two turntables was all one used in the beginning. With the exception of some break dancers the overwhelming majority of attendees stood around the roped off area and listened carefully to the emcee. A rapper sought to express himself while executing keen lyrical agility. This was defined by one's rhyme style, one's ability to rhyme on beat and the use of clever word play and metaphors.