well, the con I go to is for Sci Fi, Fantasy, Comics, Anime and things like that... There's one room that's built with several sets, like a Jabba the hut set (including a jabba and other guests), a droid shop, a V for vendetta set and different other goodies each year
1 ... Last year they also had all the nazgûl and a perfect sauron... It's pretty well made and fun too!
These guys also move around all day, there's about six different ones...
There's of course always jokes among the staff and since I know a lot of them it's always fun!