The official currency in the UAE is the Dirham also referred to as the prefix AED (Arab Emirate Dirham) or abbreviation Dhs which would follow the numeric amount. The dirham and the US dollar exchange rate is fixed at US$1 = Dhs 3.67.
There is a 10% service charge added to bills in hotels, restaurants, and bars, additional tips can be left in the amount of a few dirhams as most of the time the service charge goes to the restaurant and not the person who served you.
For more detailed information, consult our guide to tipping in UAE