They will find that while many people in HK are prejudiced against Indians,
WGs, especially those with some experience, are generally less so. Reason?
The international language of money.
Being sensitive to slights, though understandable, is not a good starting point.
Several bros of South Asian descent have done quite well for themselves with
WGs, including HGs, thank you very much. Their secret, if there is one, is to
have a sense of humour and not take themselves too seriously; it doesn't hurt
to be well groomed and freshly showered as well. See reports by rajrammer
(British Indian) and indguy.
And I second realvision's suggestion: Start with a busy walkup building. If you
are turned down by one girl, just laugh and move on to the next one. She
doesn't know what she's missing.