You can call the boss directly to ask about it next Wedn

if you haven't received their response then. It shows that you are very interested in the position and are proactive. Most people are actually glad to receive such calls. Here is the risk. Some people may get annoyed by this.

If you have met the boss, think about if s/he is open and is receptive for the call. Also estimate what may be your position in their candidate list. If you are their first choice, you may not need to take the risk to annoy the boss. If you are behind the indian girl, it doesn't hurt to call. It may put you ahead of the indian girl. Combine these together, and choose the option that gives the best return/risk ratio.

As for the Chinese lady, I don't think it is ethical to ask her for lunch or dinner before you receive their final notice that you are accepted or rejected. It is perfectly fine if you had known her before. It is my personal opinion.