No one in the crowd is wearing a mask, nor are the players (whether in the game or on the bench) are wearing masks. However, they are making the few dozen media members and photographers beside the court, the cheerleaders and the bands wear masks. Probably 250 people out of 10,000+ people in the arena are wearing masks.
I wonder if they make the band members sterilize their instruments every time they blow into them? Can a person catch Covid from the music?