[calvinbhai]

It works here in US too. Wave a few $ bills at a packed bar, you'll get to order your drinks quickly. (usually those dollar $ bills go as tip).

In India its almost always like this at most of the local grocery shops, vegetable vendors and bakeries. Often the customer holding up is oblivious of others waiting, and the shopkeeper cannot just cut a conversation to serve the new customer in line (unless he'd risk being considered rude).