What are some good ways to get a "cat smell" out of a house?

I am having a party in a few weeks. I’m painting some rooms, and I have no carpeting in my house at all. Nevertheless, I feel like my house may smell like cats. I am planning to wipe the walls and wash the curtains. The couch cover is removable and is won’t be put on the couch until the last minute.

Is there anything else I can do to ensure, or to try to ensure that the house does not smell like cats? Or, if there is a cat smell, is it inevitable?