on the day we ate at Jiko, we spent the day at AK, and made the mistake of riding Kali River Rapids. (My wife refused to ride it, and she was smart to avoid it. This is because she remembered getting soaked before, whereas I didn't recall getting very wet at all during our previous visit.)
As you might expect, my son and I got completely soaked. We didn't have time to go back to our hotel to change. While we both had dry shirts to change into for dinner (polo shirts), our shorts were
completely drenched.
So my son and I both wore the brand-new men's bathing suits to dinner at Jiko that we bought right before dinner in the AKL gift shop.

They looked just like dress shorts. Nobody gave us any trouble.