In many countries, tipping at a sit-down restaurant is considered customary and is generally expected by the servers and staff. While it may not be legally mandatory, it is a significant part of their income, especially in places where the minimum wage for tipped employees is lower than the standard minimum wage.
In the United States, for example, tipping is a common practice, and servers often rely on tips to make a living wage. The standard tipping percentage is typically around 15% to 20% of the total bill before taxes, although some people may tip more or less depending on the quality of service or personal preferences.
However, tipping customs can vary from country to country, and it's essential to be aware of the local norms when you are dining in different places. In some countries, tipping may not be as common, or service charges may be automatically included in the bill.
If you are unsure about the tipping culture in a specific location, you can inquire with the restaurant staff or check online resources or travel guides for guidelines on tipping practices in that region.
Ultimately, while tipping is often considered optional, it is a way to show appreciation for good service and to support the hard work of the restaurant staff. If you are satisfied with the service you receive at a sit-down restaurant, leaving a tip within the customary range (e.g., 18% to 20%) is a generous gesture that is generally well-received.