Apparently there are three US jurisdictions that don't allow refusal of service based on political beliefs, and Washington, DC is one of them. It will be interesting to see if any DC restaurants emulate the owner of the Red Hen in Lexington, VA….and get a rude awakening.

https://lawandcrime.com/high-profile/d-c-establishments-could-get-in-serious-trouble-if-they-discriminate-against-trump-admin-staff/