That is an interesting case, although to my mind this highlights how little-defined much of the ADA is in the real world. By the same logic used in that case, a company could sue not to have wheelchair ramps or handicapped parking because their snobby clientele find them ugly, don't like having to walk extra steps to go around them, and wouldn't return if they had them in place. Do I think a court actually would say that - no, but again, there aren't a lot of parameters laid out in that case other than "The customers didn't like it and it might have hurt sales". That's a really, really broad metric that would almost certainly need many additional layers of modification if it came up in regard to other real world situations, because if taken to its logical conclusion it would quickly become absurd.