The best time to arrive and get to see most girls would be 830pm. As most coyote bars official working time for coyotes is 8pm sharp. Some do come late but most would arrive before 9pm. Likewise for agogo bars like Baccara/rainbows group their cut off time is before 9pm. Although many ang Pai dun care and come in after 9pm because they dun care hoots about the monthly salary. They are here just to get customers to barfine them.
So best timing for bars would be 0830pm onwards. If u go late on weekends, chances are some of the ang pais girls will be barfined the moment they go on stage. Regardless of weekdays or weekends just observe the timing stated to avoid disappointment.
As for massage parlors like lord / nataree etc , best timing would be at 5pm. U would probably see the 80-90% of the girls available for the day. Not neccesary getting first blood for the day though.
Hope that helps.