Yes, in Cairo it is customary to tip. Tipping is a sign of appreciation for good service and is expected in many situations. When dining at a restaurant, it is customary to tip about 10-15% of the total bill. It is also common to tip hotel staff, cab drivers and tour guides. In some places, such as public restrooms or gas stations, an employee may expect a small tip for their services. Overall, tipping is part of the culture in Cairo and is expected in most situations.