There's been a lot of confusion surrounding Gilley's ever since South Side Music Hall opened. The entire building is known as Gilley's Complex, but the big question is: Which of the complex's four venues is actually known as Gilley's? Here's the lowdown: Gilley's is South Side Music Hall. It's called Gilley's when Country and Western shows like, say, The Big D Opry take place. For the rock and roll shows it's called South Side Music Hall. Despite the alternating name, the cavernous venue's look remains the same. But thanks to the warm-lodge look of the interior's stone walls, it feels more natural as a country music venue. It doesn't hurt that the wood floor offers plenty of room for line dancing.