Yes, wrong to do that by the West Ham owners, not something arranged by Potter.
Looking at the Hammers owners that's par for the course.
If you're looking at it morally then an incoming football manager shouldn't negotiate his position until the currently contracted manager is dismissed but it really happens all the time.
Old manager dismissed & the new one announced within a day or so because its already been arranged.
Whether the negotiations are taking place at the training ground or a nearby hotel, is there a difference? all fairly sh1tty.