The Knock Knock Hostel is run by three Argentinians who have been living in the city of Curitiba for a few years. It's a big house, composed of several shared rooms, some of which have a private bathroom. The breakfast is included in the better rooms. The decor is all musical, with vinyl on the wall, and rooms named after dance rhythms like tango and flamenco. It has a barbecue and an open area with hammocks. The hostel provides blankets, bedding, and towels, and offers tango classes. It also has a television room and ping pong!
This is a really lovely place, very beautiful - one of the best hostels I've seen anywhere in the world. The building dates back to the 1950's, and everything has been kept in the original style. There are bright colours everywhere, giving it a cheerful touch. Prices vary between R$40 and R$100 per person. The mattresses are comfortable, and they have thick blankets - important in this cold city. Like the rooms, the bathrooms are clean all the time, and colourful. The owners are always around if you need anything. They have breakfast available, and a huge kitchen if you'd rather do your own cooking. There's also a barbecue, laundry facilities, and a pool. The best option for a stay in Curitiba!
I went backpacking in Curitiba for the first time in July 2012, and I liked it so much that I went back three more times the following year, in February, May, and August. This hostel has a very friendly atmosphere, with different options of dormitories and private rooms, a communal kitchen and garden. It has an excellent location, in one of the most beautiful areas in the whole city. The staff are friendly and attentive, and the owner tends to hold a party every Sunday on the large balcony, with a caipirinha for every guest. I had a great time here, meeting people with fascinating stories to share from all over the world.