OK....here is a place to try

http://hajimerobot.com/bangkok/en/contactUs.php

http://www.youtube.com/watch?v=Ov4vSc6ai4M

its a fun place , all you can eat is about 500 baht each , you can have Hot pot or a Korean type BBQ , and soft drinks are included . I think you get 90 minutes to eat ,

We went in the afternoon and it was pretty empty , but they say to call for reservations !

It was fun but I think it would have been more fun if it was fuller as the Robots would have had to "work" more serving everyone,
Plus the Robots put on a cool "show" and if its empty ask them for a repeat performance so you can take better pictures

its about 5 miles from Asok - Sukhumvit but its in a small mini mall and upstairs , our taxi driver got lost and we had to get out the iPhone GPS,

its off Rama 3 which is the same street as Asok. so print out the map and bring the phone number