So I was just browsing their website and noticed that they sell a bunch of 40 oz malt liquor brands like Schlitz Red Bull, Coqui 900 etc. which was kinda odd. Website said that selection varies by location. I was wondering if the one in Fairfax has any of those? Seems strange a higher end place like this would have that.

No FFX does not. They only sell FFX drinks, def not those.