That said, I don't think most businesses would deny a guide dog in training.
I agree.
Then there are the my-rules ways of little general stores... one around here the owner wouild most always say "please leave the dog oustide, there's places to tie him you can see him ok from inside the store." Except for this one black lab that the dog owner would come in with and head back to the deli counter, dog folowing. Then the store owner would always shave off a piece of some kind of meat or even cheese for that dog: a little roast beef, a piece of salami... This one guy who was new to the area saw that one time and started up about why not his dog too then, and the store owner just looked at him and said that's not a dog that's Buster. It's a hassle living in the sticks sometmes but then sometimes there are little fringe benefits if you hang around long enough.