Yeah just go to a few malls. Get a small note pad and write out a lad of notes with something along the lines of
'Friend Request
To Accept Text (and put your own phone number here so they can text or call you)'
If you have line/viber could also add your i.d
Then smile and walk off before they read it.
If you are a bit more confident, walk off slowly and they may try speaking to you, then you just let the convo flow from there.
PI girls are easy to chat to cus their not that shy, just keep asking questions and they'll talk about themselves forever, tell them your a noob there and ask where you could buy certain things, foods or whatever.
Also wall paper not that big of a deal. Tell them you wanted to know the real side of PI and meet real people, not just stay in a hotel or some place fancy, you took a shared place to meet locals and learn their culture etc..
Make jokes about the room and wallpaper before they even come over, saying it's lol but now problem cus people there are nice (even if they are not) they're flippers unless your bagging a hi class one (which you wont be) then they will just lol it off themselves, prolly think your cute and will surmise your not a 5 star baller they can rinse for money.