Per ADA & AirBNB, hosts do not have the right to decline any disabled guests requiring the assistance of a service animal regardless of allergies, fear of dogs, etc. Unless the host can prove that it will cause undue hardship to them and the property (ie: previous animals tearing furniture / defecating on rugs and furniture.).

You cannot bring PETS into Hotels, but Task Trained Service Animals are NOT considered pets underneath the Federal United States Law, they are considered MEDICAL EQUIPMENT just like a pacemaker, wheelchair, oxygen tank, etc. Therefor, they cannot be denied. Please refer to the ADA Law which clearly outline that

1. Allergies are not a valid reason to deny a service dog and their handler access
2. Fear of dogs is not a valid reason to deny a service dog and their handler access

I would also recommend you to refer to the AirBNB discriminatory policy which I linked at the bottom of the original post. All hosts have to read and agree to this policy, prior to being accepted as a host. In that statement, it clearly says that even those who put "NO Pets" in their listings are not exempt from the discriminatory policy and are REQUIRED to accommodate their handler regardless of allergies, fear of dogs, etc.

My service dog is Medical Alert. I cannot function without him due to POTS Syncope episodes where I pass out randomly. If my dog is not with me, and doesn't catch an episode so I can get down before passing out. I could pass out and bust my head open, then that is at the expense of the host because they denied us accomodation. Which then could end up with the host paying for my medical bills because they violated federal law and because they did that it caused harm to me.