why does it say " closes at 5 p.m. when we have tickets for an 8:00 show?

The gallery is closed at 5. Music venuses arent posted as "open hours" for some reason. They will be open . I have the same question the first time I went. 😉

I think on line closes at 5, tix available at the door

My guess is that the box office closes at 5.

I would use the phone to find out exactly what that means. I can only guess that it means the Box office is closed.