Being in a city on holiday without needing a map gives you freedom.  You either have no idea where you are and happy to experience what ever comes you way – or you actually know where you are going.  I can confidently say there is a small part of Tokyo I can navigate (providing it’s light) without a map.  I can get my self to at least two coffee shops, a patisserie from our regular hotel in Tokyo – which is the basics in life!