How do I get Sardar to talk to me

Hint 1 of 9:

You'll need to make him your friend first.

Hint 2 of 9:

He'd like a drink.

Hint 3 of 9:

You can't just go any buy him a drink, so you'll have to find a ...

Hint 4 of 9:

... tricky way to get a drink.

Hint 5 of 9:

Start by buying a drink for yourself.