Remember the old siam hotel coffee house where the FL gals cater mainly to the local Thai and asian.
The Siam Hotel on Petchburi Road, a long time survivor from the Vietnam War era, was demolished in mid-2007 to make way for a new "boutique" hotel. As of November 2007, all that remains is the sign.
In more recent years, since at least the early nineties, the Siam Hotel was mostly famed for its coffee shop, the Come Prima, which was roughly equivalent to the Thermae or Grace Hotel coffee shops, but catering to a primarily local clientele.
http://www.oldbangkok.com/hotel-images3/pages/siam.htm