Rule 34 being what it is, there is an adult version of Westworld called Sexworld (1978) and it's not too shabby, they threw enough budget and production values

Rule 34 being what it is, there is an adult version of Westworld called Sexworld (1978) and it's not too shabby, they threw enough budget and production values at it to make it interesting. It explores the theme of what happens when you get to live out your fantasies in some surprising ways. The movie can be found online in the usual places. Also, the list left off Futureworld (1976) which is much better than Westworld and featured some CGI that was ground-breaking for the time.