This one’s difficult to rate since the two novellas vary in quality so much.
The titular Cathouse was probably a 4 or 5. Dean Ing can write action scenes masterfully, and the protagonist’s struggle with learning primitive Kzin culture is fun for the slower portions.
Briar Patch, the second novella, feels like a retread of the first just with a different primitive culture and the sexual aspects get really uncomfortable. He throws a fit that this totally unknown culture doesn’t follow his views on monogamy, constantly denigrates his partner’s looks, and repeatedly comments on the attractiveness of a 12 year old child and how he can’t wait until she’s 18. What happened to the scrawny ethnologist turned action hero from the last story? It does get better as Ing returns to his element introducing suspense and action, but it never totally gets the nasty taste of the previous section out of your mouth.