Actually, pigeons go multiple places each day and keep a schedule. I used to have this neighbor who would feed a bunch of wild pigeons and they would be there all lined up on the roof over his door waiting for him to get home from work. After he moved they quit coming around, probably because these other neighbors were feeding about a dozen feral cats at the same time (who all mysteriously disappeared).

So, yeah, train the pigeons well enough and they can set up delivery routes.