My dad had a membership in that 1st Chicago club in it's early 60's prime.
Company paid for it through an expense account, no way he could afford to 'date' one of them on his salary at the time.
Clients coming from out of town literally expected to see people having sex on tables.
They were disappointed. Food and drinks were decent but overpriced and there were much better places to get a steak in Chicago.
This would have been around 1968. She was not a current bunny, but had been.