Lavaca St bar, on I think 4th and Lavaca downtown is supposedly catering more to SEC fans this year. I'd imagine there will be a lot of LSU folks there.
More north, there is bagpipes at 183 and burnett (se corner of intersection) which has cheap beer (5$ pitchers last year) and they seem willing to change channels to various games.
In Round Rock you have 3rd base, at IH35 and Texas 45toll.
I've never found a huge gathering of state fans at any particular spot. My guess is that most watch at home.