In Graaff-Reinet, South Africa, it is customary to tip about 10-15% of the bill for good service in restaurants. For exceptional service, feel free to tip more. The amount of the tip is at the discretion of the guest and depends on the quality of the service. For cab drivers, rounding up to the nearest dime is usually appreciated. Always take some change with you to tip service staff such as hotel doormen or vehicle attendants. However, tipping culture can vary, so it is important to be aware of local customs.