Thank you all for your feedback and suggestions bros!
bonkers89,
Actually I did this search, but the information I read was of little use.
For example some people say that WG have their QQ number in the status -- never seen this near the places I visit.
Some others approach girls with "$$$?", which is clever but I think not very elegant... I don't want to offend civvies out there.
Other experienced lustful lords have described a more delicate approach, however this takes for granted that the contact is a potential WG. Now my question is, how to identify a potential WG?
I have found one that had an explicit nick (something with the meaning of WG), but she didn't reply to my inquiries.
So far I just got a number from a girl. Still have to meet her, but think she's just a civvie.