You might not have heard of it, but Low End Theory is famous to fans of underground hip-hop and electronic music. The club night’s performers, DJ Nobody, Thundercat, Nosaj Thing, Flying Lotus and Tokimonsta, have shaped music far beyond LA’s beat scene, attracting the attention of performers like Kendrick Lamar and Thom Yorke. After twelve years, divided by a rape allegation, it ended. Here’s a dispatch from the final performance, and a look back.