If a spare evening, Rialto Theater
https://www.rialtotheatre.com/calendar/
There's shows a few times a week, always on weekends.
As for the zoo, skip it, it's rather small.
Look for Art shows. There's almost always one going on.
There's frequently an after party.
Here's the Tucson Artists face book group page
https://www.facebook.com/groups/657310857637949/