I don't think they're on every floor (maybe someone else knows for sure) as VWL is the smallest of all the DVC resorts. If I recall there's one on the first floor near the back door exit that goes out to the pool area.
The one on the first floor is the only one I know of as well. We always stay in studios and haven't found any others. It's a great location if you want to sit by the pool while your clothes wash and dry.