Answer: Contacting the Justice Department about a potential discrimination lawsuit.
Explanation: According to the Civil Right Acts , the discrimination on the basis of religion,color, race, sex ,etc is illegal activity and is considered outlawed.
The situation mentioned in the question that happened with Jacob Smith is the case of discrimination as he was asked to sit aside in restaurant because he is an African-American.
He should contact the Justice Department about this situation and can claim a legal action towards the restaurant and staff for their discriminating behavior.