I have posted my story many times. My parents (and I myself) are strictly against the “Lerkee daikhoo” picnics. When I was in college at that time ammi said was like
“look XXXX, I’ll not be doing this muft khoree at lerkee homes. If you find someone, tell us warna hameen bata daina, we can find some one for you”
So I was visiting Pakistan and this common friend of ours made up a story that we need to rent a house. My MIL was giving first floor of her house for rent. So I, my mom and that common friend went there. I met my MIL, BIL, and one of the SIL. “lerkee” gave me the tour of the house not knowing that I was taking more interest in her than house ;). She was not in make-up or lerkee-daikhoo-type cloths. Just everyday cloths (plain, simple yet aaaah… killer) Had almost hour long discussion/tour with her. She was studying in my X university so we found lots of things to talk about.
I also found some common topics with ‘lerkee’ k bhai , had long chat with the family. Just general talk etc. They offered us Tea and samosey as far as I remember that was pretty much it.
when proper proposal was sent int, they did some back-ground investigation over in Pakistan and mostly in US. I talked to them few times and talked to “lerkee” 3-4 times before they said HAAN.
not too many twists in my story huh?
Needless to say: I still bug her and ask for “house tour” 
My serious advise: Be your self. Dress nicely and stuff but dont fake yourself !