The South Park Banquet Hall is a function hall that appears in Season Three episode "The Red Badge of Gayness".
Background[]
The Confederate and Union re-enactors gather in the banquet hall for a briefing in preparation of the re-enactment of the Battle of Tamarack Hill. Meanwhile, Cartman, dressed up as Robert E. Lee, makes a bet with the other boys that the South would win the war, taking them as his slaves if he wins.
After the re-enactment, the re-enactors from both sides were invited to an after-party at the banquet hall. When they were all drunk on S'more Schnapps, Cartman manipulates Jimbo to rounding up all the re-enactors (including the Union) to take over Topeka, kick-starting the campaign for the Confederacy to turn the war in their favor.