They serve Barton Springs Root Beer. It's tasty, but be warned, if you like your root beer sweet, it might not be for you.
They serve Abita root beer, though it comes in a regular soda cup rather than the standard Abita bottles.
They carry Appalachian Brewing Company sodas, including their excellent root beer, which you can buy in growlers.
The root beer is actually fantastic. Sweet upfront but with a classic root beer finish. Probably the most redeeming quality of the whole restaurant!
