A dub where I work just returned from visiting friends in Upper State New York (can't remember the town) and the dub there has "environmental allergies". Allergic to everything, you name it - she's got it. Soap, shampoo, detergent, etc. etc. So naturally she can't go to the Kingdumb Hall because of the rugs and smells and the perfumes and even soaps and things, she gets violently ill. The dub who visited her had to bring unscented all-natural everything down with her, wash her clothes beforehand a couple of times with all-natural unscented soap, etc., just to be able to go into this dub's house.
So... maybe you could pick up some of this stuff at the health food store, just keep it around, and tell everyone you're developing all kinds of funny reactions to things. If they offer to hook you up by telephone to the meetings (they do that for my mother who is pretty much an invalid now), then pick up the phone, when they get the connection going you just hang up. They won't know. Works for us !
Now whether or not this person my dub workmate visited really does have all these terrible allergies or not is anybody's guess.