I think that girl with the short red shirt was falsely identified as Sarah Telgarsky, although I knew it wasn't her. I haven't been able to find Sarah T either. That girl in the red shirt was also identified as someone else. Can't remember the name, but she is associated with auto racing. Although, I read that she never left the raised area to the side of the dance floor. That woman looked a lot like the red shirt girl and I swear it's her.
i have to edit my post because I see dionyzus came through for us. I'd say that's Sarah T in your capture. Good job! I'm going to say that woman with the red shirt up near the stage was Pamela something?