There does seem to be a small population of Asians in San Jose who have normal working jobs as they do in every country; Chinese restaurants, etc. As for Asian working girls, I've only ever seen two, and from what I remember they were half Asian and half Panamanian.
I have encountered several who worked in eating establishments, and despite my efforts and much to my chagrin

......I was unable to get anywhere with them and finally gave up. I suppose they had me pegged as just another whore mongering gringo [and they were correct].
As for the Russians, I do believe I have seen several Eastern European working girls in the Blue Marlin.
Zebra