We have ADRs set up (done by our agent), but if we decide we don't want to go to one of our dinners, or time prohibits us for some reason, where do we call while at the parks to cancel an ADR?
There has also been mention that you can stop by any restaurant podium to cancel a reservation (at any restaurant). Not sure of the veracity of that claim, just what I heard (more than a few times). I'm sure concierge can also do it for you (since they can make them ).