Ok, every time TL is brought up, people say how Monsters Inc. Doesn't belong, well it does make sense, if you know the back story.
Tomorrowland is a meeting place for members of all the galaxies, the alien world, human world, and other worlds (even the monster world). It is a futuristic "space port". Monsters inc is held in the Tomorrowland Interplanetary Convention Center, which Monsters Inc. has rented out to hold their new Comedy Club. Because they need laughter from humans, it was held at a meeting point for the universes. You enter the lobby (themed to Tomorrowland), and enter the portal into the monster world to get into the comedy club. At the end of the show, you walk through another portal returning you to Tomorrowland. Monsters Inc. only rented out a small part of the convention center, enough to hold the first line, and the portal, beyond that, you have left Tomorrowland. It makes sense for an act like this to be held in a convention center, as events of all types are held at convention centers. America the Beautiful (and the other 360 films) didn't have anything to do with TL, but it still fit, and nobody complains, and the Timekeeper was also at the Convention Center.
Rant over. And to those who say it doesn't "fit" even after reading the story, there are other Disney attractions that REALLY don't fit if you know the story, but people like those rides, and therefore don't question them. Just because you don't like Laugh Floor doesn't mean it's misplaced thematically.
