Can I leave a ticket at the box office or somewhere there for a friend that will show up late? It's already purchased, they just won't be there until shortly after it starts

Yes, it's called will-call. They only have to walk up and give the code to the ticket that you purchase, and it's waiting there for them.

I would take Barbara's advice and call first.

I think there's a "will call" window. You probably can leave the ticket there, but you might want to call just to make sure

Thank you all for the help, it's much appreciated!