It has been a long time since I have been to one of these NYC parties, and I know that they get new ladies all the time, but the second woman sounds like Anastasia - although I remember her as being more blond than brunette. Anastasia is certainly ticklish enough that she doesn't have to sell...
I have seen the show eight times now (yes, I am a little obsessed) and there has been some kind of tickling in every performance I have seen and it seems like more and more is happening each time...
Most often it happens just before "I Believe in Love," the big song introducing the main female...