Pet Hotel/Motels, which are fancy kennels, can be separate commercial establishments from pet stores and animal hospitals. I put Indy in the boarding kennel at his vet but there is a fancy schmancy place not too far out that's a five-acre ranch just for pampering dogs while their owners are away. I think they offer grooming services but I don't know if they offer them apart from boarding. *shrug.
Anyway, there's places like this and it's definitely not like waymarking every PetCo on every corner. :)