Generally, a tip (a percentage of the total biil left as a gratuity for the server) is expected at any restaurant where a waiter or waitress serves you at a table. Servers receive low hourly wages because they are expected to earn tips from their customers based on their level of service. The acceptable standard is 15-20 percent of the total bill. Some expensive restaurants will automatically add an 18 percent charge, called a "gratuity charge," to your bill. Standard restaurants may also do this if you have a large number of people in your group. Generally, you should leave no less than a 10% tip even if you did not feel you received the level of service you expected. This will communicate your dissatisfaction without completely disregarding the service.