where you could leave your dog in a crate, with a toy, while you went to the shop to get bread and eggs. They could be lockable with a 15 minute maximum stay per dog, per 24 hours.
It would be SO convenient to be able to combine my daily dog walk with popping into the shops to pick up last minute supplies. My dog would get a longer walk. As it is, I walk the dog then go home then have to leave the dog on her own at home while I walk or cycle into town to get milk or bread or buy a birthday card or whatever.