Rio has a large playroom full of cute puppies, and since the admission charge is incremented in ten-minute intervals, it's easy to just drop in for a quick visit. Maybe because of the cafe's popularity, the pups seem to be a bit more jaded than other dog cafes we've been to, but with a little patience you can usually make friends, especially if you spring for dog treats.
There were nineteen dogs on duty when we visited, most of them small breeds, and they all seemed to be well house-trained (no doggy diapers in view, unlike many cafes), although there was a bit of cleanup activity from time to time. Gigantic rawhide bones for chewing are a very popular attraction, even for the tiniest dogs.
The playroom has lots of comfortable seating for visitors, with two large-screen TV monitors showing cartoons in one corner. There's a drinks bar in another corner, and the Y350 drinks fee that you're charged when you enter gives you unlimited servings of coffee, tea and other soft drinks.