Unique bars in Japan / Tokyo

Hey, I am going to Japan around March / April, more specific hiroshima, osaka, kyoto and tokyo. I have heard that you can find fun unique bars in tokyo, for example Muscle girl bar, Sumo Wrestling bars, robot bars? and so on.
Do you have any recommendations for such, bars that's also an experience and that is cool for a tourist to visit? I think it is more common in Tokyo but if you have recommendations in the other cities, please list them as well!

by BiggieBear