Robot Restaurant

I am going to Japan in September of this year with my school and we were wanting to go the robot restaurant. However, upon inspection of the closest one being in Shinjuku I found that the attendance is very expensive. What are some alternatives that are less expensive? For example other themed eateries.

The Ninja Restaurant in Akasaka is fun: http://www.bento.com/rev/3665.html

It's not that cheap, but you get a very good meal along with the entertainment, unlike at the Robot Restaurant.

The Robot Restaurant is really misnamed as it's only barely a restaurant. It's a robot show with optional food, which - in all honesty - isn't very good. If the 8000JPY entrance fee is too steep for you, you could try a la carte at Ninja, as Umami Dearest suggests or perhaps one of the 5 Alice in Wonderland restaurants around Tokyo, or the Vampire Cafe or perhaps Alcatraz ER. There is only one Robot restaurant and there's nothing else quite like it.