I seriously doubt that Chick-fil-A has ever denied service to a LGBT customer. But that's not the activists' point. Nor is accepting them as human beings, which the company undoubtedly does as well, as part of their Christian belief system.
No: in order to avoid being attacked, boycotted, bullied, smeared and harassed by the LGBT lobby or by any other such Accredited Victim Grievance Group, you must endorse and embrace their agenda without question.