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 it, but she definitely does oversell at times.
The girl with the police siren laughter sounds like Lola B. I believe she is in her early to mid 30's and I thought her reaction to being tickled on her feet sounded more like a swarm of bees. Her hip bones are definitely her worst spot, but her knees are also pretty bad. A few times I simply grabbed her knees and she wriggled so much that she was pretty much tickling herself. The knees and the hip bones have always elicited full-on laughter for me. I learned to just bypass her feet.
The girl with specs and tattoos sounds very intriguing.
One other thing I will say about this particular party is this: when I started attending (about five years ago), just about every time I would meet a girl who would claim to be ticklish and actually wasn't. The last two or three times I went (which again, was quite awhile ago), the ladies were very upfront about lack of ticklishness. As backwards as this would sound out of context, it was nice to hear ladies admit to not being ticklish - that way we weren't wasting each others time.