If you're a fan of live theater performances, book yourself some seats for a show at Guaira Theater. Check online for times and prices.
You'll soon find out why this Curitiba Centro arts and culture attraction is a hit with travelers. If you're looking for other things to keep you busy, Barigui Park, Botanical Garden of Curitiba, and Oscar Niemeyer Museum are in the area too. They won't take very long to reach from Guaira Theater.