In Dubai, is it a norm giving tips in restaurants, eg 5dhs tips after a 100dhs meal ? In Spinneys, the cashier is supposed to give me a change of 5.25dhs, but he give me 5dhs instead. In paying for taxi fare, I paid 10dhs for a 9dhs trip. The driver did not initiate to give me the 1dhs change. As s...