Which post are you referring to? Actually you seem to know all the details according to your post and why are you claiming he picked them all up in bars and that many if not all were not business get togethers?
The DA you mentioned believed him guilty, but these are hard crimes to take to court against a figure as rich and powerful as Cosby without a lot of evidence.
"“I was 19 years old in autumn of 1969. I had flown to Los Angeles from New York to work on a monologue with Godfrey Cambridge. Two women I was staying with were friends of Bill Cosby, and they took me to have lunch with him in his cottage at Universal Studios, where he was shooting The Bill Cosby Show. He was always generous with his food and drinks, though he never drank alcohol. But he always topped my Bloody Mary’s with beer, which he called a ‘redeye.’
“Cosby seemed to take a liking to me, and so I was invited back a few times. I was naturally flattered. I visited the set on my own and he once introduced me to Sidney Poitier as ‘Midget,’ his pet name for me because I was 5’3″.
“One day he asked me to stay after the shooting and work on some material with him. I was even more flattered and thought this would help move my writing career along. In his bungalow he made me a redeye, and I began to tell him about the earthquake Los Angeles had just had and the sound it made. He liked my ideas for an earthquake bit.
“The next thing I remember was coming to on his couch while being undressed.
Did she become upset with him when sex didn't advance her writing career?