Actually, not completely in competition – you could possibly do both if you were motivated enough, but I'm not.
At 6pm, Zax Pints and Plates (Barton Springs & Riverside) will tap a cask of Saint Arnold Christmas Ale, which has my mouth watering just thinking about it. This has become one of my very favorite holiday beers, so the thought of getting a cask-conditioned version makes my mind explode. But the thought of driving or even taking the bus downtown during rush hour is unappealing. Perhaps if I worked downtown.
But at 8pm, North by Northwest will tap a cask of porter, so I think I'll be doing that instead. Note that this is a week earlier than their usual last-Wednesday-of-the-month cask-conditioned night, and it's an hour later than usual.