Final answer:
The obligation for liquor primary establishments to serve all individuals is false; they must adhere to laws and may deny service based on factors like age or intoxication, and have historically discriminated against certain groups.
Step-by-step explanation:
The statement that staff members in a liquor primary establishment are under the obligation to allow entry and provide service to all individuals is false. While businesses are generally expected to serve the public, they must also adhere to various laws and regulations. These regulations can include denying service to minors, intoxicated persons, or others who might present a danger or disturbance.
Furthermore, historical context shows that regulations have been used to discriminate against certain groups, as seen with bars being shut down for serving gay and lesbian patrons after the end of Prohibition. Thus, while a policy of inclusivity may be encouraged, it is not absolute and is subject to legal and regulatory constraints.