I missed couple of key data in my report above, adding it here in the reply as edits would go unnoticed at this time.
I did find some European women near Grace hotel lobby, for those who are interested can check this place out. Was walking casually after my mean and noticed 10-15 freelancers spread on the way to entrance.
Also, I did find some Arab women (at least dressed so in their black suite/burkha) on the Nana plaza stretch - from Sukhumvit --> Nana Plaza --> walk past Rajah hotel . Found a small group of women around 10pm time.
Found more ladyboys on the the Sukhumvit road.
Favorite spot to sit -- Bar in the Rumachitt hotel ground floor -- Bush Garden Bar & Restaurant . Decent Food and a beer to spy on every girl going in and walking out of Thermae ( I don't like any form of loud music, this was my best place)
yeah at times, I have picked a girl before stepping into thermae cafe
Other times, girls do come out to pay and use toilets in Ruamchitt hotel, I get to deal with them as well.