About 10 years ago, the resorts had character meet and greets in their lobbies on certain mornings. I forget what it was called but it was when Disney decided to stop having extra magic mornings and try out the concept of character meets at the resort instead.
I know that in 2002 they were doing this. We were staying at Port Orleans Riverside then and would visit with various characters in the lobby. Not sure how long this lasted but that is the only visit that I remember this happening.
The only other time that we saw characters at our resort was in 2004. We were staying at Pop Century when Hurricane Jeanne cam through, extending our stay by a few days. Once the weather had calmed down and guests were allowed to move around the resort, they brought in a few characters to entertain the kids in the lobby.