I'm allergic to cats and dogs, but don't mind well behaved pets in a shop, because I take my allergy medicine. But there is NO amount of allergy or asthma medication that will allow me to be exposed to smoke, perfume, or more than the least little bit of dust. Exposure to those can be a matter of life or death. In virtually all of the locations I've been in, smoking is not allowed, but that doesn't stop smokers from standing outside a door, blowing smoke in the face of all potential patrons. I even had one woman with a lit cigarette try to hold the door open for me while I was carrying a tank of oxygen. I couldn't even approach the door close enough to ask her to leave. If any smoke, perfume (including potpourri), or dust is detectable at the door, I cannot enter the store.