Ah, the long lost Lollipop. Best damn place in Nana for about a year (several years ago).
The tank was brilliant. Fully naked lasses jumping in and retrieving 10 baht coins that you could throw into the tank.
I actually became good friends with one of the "divers." She was also a part time motorcycle racer. Would leave the Plaza after closing and head off for the Bangkok street races.
She once asked, and was not bullshitting, if I wanted to ride pillion on her bike while she raced. NOT!
Like a 200 pound farang on the back of her bike would help her win anyhow.