Restaurants (and other businesses) sometimes post signs stating that they reserve the right to refuse service to anyone. But Title VII of the Civil Rights Act of 1964 prohibits discrimination based on race, color, sex, religion, or national origin and the Americans with Disabilities Act (ADA) prohibits discrimination by places of public accommodation (including restaurants) on the basis of disability.

In addition to these federal statutes that prohibit discrimination against protected classes of persons, some states and cities have laws that prohibit discrimination based on other classifications—such as sexual orientation.

Restaurants have the right to exclude or refuse to serve persons that fail to meet a dress code, for example (“No shoes, no shirt, no service”) or are disruptive, for example, but they do not have the right to exclude or discriminate against persons based on being part of a class or group of persons protected by federal law or by state or local laws.

In Pennsylvania, restaurants and other businesses can post signs that they reserve the right to refuse service to anyone, but this right is limited by federal, state, and local anti-discrimination laws. Under Title VII of the Civil Rights Act of 1964, it is illegal for restaurants to discriminate based on race, color, sex, religion, or national origin. Additionally, the Americans with Disabilities Act (ADA) prohibits discrimination against individuals with disabilities in places of public accommodation, which includes restaurants. Pennsylvania law also prohibits discrimination in public accommodations, and includes protections based on race, color, religious creed, ancestry, age, sex, national origin, and disability. Some local ordinances within Pennsylvania may offer further protections, including discrimination based on sexual orientation or gender identity. While restaurants can enforce dress codes or refuse service to individuals who are disruptive, they cannot refuse service based on a person's membership in a protected class under federal, state, or local laws.