Standard tipping in restaurants and cafes of 10% is acceptable for all services, unless the service is already included in the bill, then it is not necessary to leave extra tip. Giving a tip to service staff in hotels and other places is not obligatory, but it is common to leave a small amount of money as gratitude. A service tax usually is not included in cab fees. If you are going to hairdresser or any other beauty treatment saloon, it is common to leave a little tip.