Cribbing its name from Austin’s famed Congress Avenue psych-rock incubator of the Sixties, the new Vulcan Gas Company – which popped up on Sixth Street in early 2014 – focuses on electronic music. International DJs, electro bands, and, occasionally, hip-hop acts have a premier platform in the 600-plus capacity club with a second story that looks down on the stage. Production value is through the roof with ultra high-fidelity light and sound systems, but VGC’s best kept secret is a tiny rooftop balcony that offers an unparalleled vantage point for Sixth Street people watching.