Conversation so far:
What is traditional style marching?
marching bands geared primarily towards crowd entertainment and perform on football fields.
Are there any other interesting aspects about this article?
Typically, they perform a routine before the game, another at halftime, and sometimes after the game as well.
What makes up the style?
A recognizable style of show band is the one fielded by historically black colleges and universities (HBCUs).
Was this typically done to music?
music selections are largely based on R&B, hip-hop, and contemporary popular music.
How long does a routine typically last?
CANNOTANSWER.
can you tell me more about uniforms?
CANNOTANSWER.

Question: When did they typically  perform?
Self-contained rewrite: When did marching bands typically  perform?