Final answer:
Bonnie and her friends were seated on the right-hand side of the ballgame, as indicated by the location of the drums and the orientation of the seats relative to the stage.
Step-by-step explanation:
The information provided from the various excerpts indicates that Bonnie and her friends had their seats on the right-hand side at the ballgame. This is made evident in the excerpt where the ticket seller exclaims that the seats are right up against the drums, which are located on the right of the orchestra as you face the stage. Therefore, as you face the house, the seats would be on your left, but from the perspective of Bonnie and her friends who want to be on the right-hand side, they are indeed on the right as they face the stage.