Have been a visitor to Rios for over 20 years and have always enjoyed going (alone). Its a great place to chill out and relax, and if any action happens its a bonus. I do think that the idea of permanenent naturism ought to be brought back (as it was 20 yrs ago). The management also should be aware that the hordes of swimsuit clad ladies on an afternoon and evening who insist on washing themselves in the steam rooms, scraping off dead skin, and generally spreading all their stuff, towels, creams, oils over half the room should be stopped.
Thankfully the idea of men having a shave in saunas and steam rooms has largely been accepted as unhygienic - the same should be said of these ladies practices!