A couple of my favorite places to watch a game...
American Airlines Center - Dallas, TX
NBA Dallas Mavericks - 19,200 capacity
NHL Dallas Stars - 18,532 capacity
Darrell K. Royal Texas Memorial Stadium - Austin, TX
University of Texas Longhorns - Capacity 85,000 (as of last year), 92,000-99,000 by 2008
The north endzone seating has been torn down and a new double-decked facility is currently under construction and due to be finished by the 2008 season. Renderings...
DKR also has the distinction of housing Godzillatron, the largest single screen HD video board in the world...
http://youtube.com/watch?v=Abhez92rNvI
Dr Pepper Ballpark - Frisco, TX
Frisco Roughriders (AA Texas League) - 10,600 capacity